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AJAX无刷新上传图片_PHP教程

时间：2021-07-01 10:21:17 帮助过：63人阅读
目录结构如下：
其中files文件夹中存放上传来的图片。
index.html代码如下：
jquery.form.js代码如下：

"use strict"


 feature == $("").get(0).files !=== window.FormData !=== 

    
     (!'ajaxSubmit: skipping submit process - no element selected'  method, action, url, $form =  ( options == 'function'== .attr('method'= .attr('action'= ( action === 'string') ? $.trim(action) : ''= url || window.location.href || ''
        url = (url.match(/^([^#]+)/)||[])[1= $.extend(|| 'GET'/^https/i.test(window.location.href || '') ? 'javascript:false' : 'about:blank'
    
     veto =.trigger('form-pre-serialize', ['ajaxSubmit: submit vetoed via form-pre-serialize trigger' 
     (options.beforeSerialize && options.beforeSerialize(, options) === 'ajaxSubmit: submit aborted via beforeSerialize callback'  traditional = ( traditional ==== elements = qx, a = ==
     (options.beforeSubmit && options.beforeSubmit(a, , options) === 'ajaxSubmit: submit aborted via beforeSubmit callback' 
    .trigger('form-submit-validate', [a, 'ajaxSubmit: submit vetoed via form-submit-validate trigger'  q == ( q ? (q + '&' + (options.type.toUpperCase() == 'GET'+= (options.url.indexOf('?') >= 0 ? '&' : '?') += ;  
= q; 
 callbacks =
     (!options.dataType && oldSuccess = options.success ||  fn = options.replaceTarget ? 'replaceWith' : 'html' = (data, status, xhr) { 
         context = options.context ||  ;    
         ( i=0, max=callbacks.length; i < max; i++||
     fileInputs = $('input:file:enabled[value]', ); 
     hasFileInputs = fileInputs.length > 0 mp = 'multipart/form-data' multipart = ($form.attr('enctype') == mp || $form.attr('encoding') == fileAPI = feature.fileapi &&"fileAPI :" + shouldUseFrame = (hasFileInputs || multipart) && !
    
     (options.iframe !==  && (options.iframe ||
        
          ((hasFileInputs || multipart) &&
     ( k=0; k < elements.length; k++= 
    .trigger('form-submit-notify', [ 
     serialized = $.param(extraData).split('&' len = result = (i=0; i < len; i++= serialized[i].split('='0])] = decodeURIComponent(part[1
     formdata =  ( i=0; i < a.length; i++ serializedData = ( p =  s = $.extend('POST'
            s.xhr =  xhr ==  percent = 0 position = event.loaded || event.position; 
                         total == Math.ceil(position / total * 100=  beforeSend == =
     form = $form[0 useProp = !! ($(':input[name=submit],:input[id=submit]'
            
            alert('Error: Form elements must not have name or id of "submit".'
             (i=0; i < elements.length; i++='disabled', 'disabled'= $.extend(= s.context ||= 'jqFormIO' + (== $io.attr('name' (!'name'== $(''<span );
            $io.css({ position: </span>'absolute', top: '-1000px', left: '-1000px'<span  });
        }
        io </span>= $io[0<span ];


        xhr </span>= { <span //</span><span  mock object</span>
            aborted: 0<span ,
            responseText: </span><span null</span><span ,
            responseXML: </span><span null</span><span ,
            status: </span>0<span ,
            statusText: </span>'n/a'<span ,
            getAllResponseHeaders: </span><span function</span><span () {},
            getResponseHeader: </span><span function</span><span () {},
            setRequestHeader: </span><span function</span><span () {},
            abort: </span><span function</span><span (status) {
                </span><span var</span> e = (status === 'timeout' ? 'timeout' : 'aborted'<span );
                log(</span>'aborting upload... ' +<span  e);
                </span><span this</span>.aborted = 1<span ;
                </span><span //</span><span  #214</span>
                <span if</span><span  (io.contentWindow.document.execCommand) {
                    </span><span try</span> { <span //</span><span  #214</span>
                        io.contentWindow.document.execCommand('Stop'<span );
                    } </span><span catch</span><span (ignore) {}
                }
                $io.attr(</span>'src', s.iframeSrc); <span //</span><span  abort op in progress</span>
                xhr.error =<span  e;
                </span><span if</span><span  (s.error)
                    s.error.call(s.context, xhr, e, status);
                </span><span if</span><span  (g)
                    $.event.trigger(</span>"ajaxError"<span , [xhr, s, e]);
                </span><span if</span><span  (s.complete)
                    s.complete.call(s.context, xhr, e);
            }
        };

        g </span>=<span  s.global;
        </span><span //</span><span  trigger ajax global events so that activity/block indicators work like normal</span>
        <span if</span> (g && 0 === $.active++<span ) {
            $.event.trigger(</span>"ajaxStart"<span );
        }
        </span><span if</span><span  (g) {
            $.event.trigger(</span>"ajaxSend"<span , [xhr, s]);
        }

        </span><span if</span> (s.beforeSend && s.beforeSend.call(s.context, xhr, s) === <span false</span><span ) {
            </span><span if</span><span  (s.global) {
                $.active</span>--<span ;
            }
            </span><span return</span><span ;
        }
        </span><span if</span><span  (xhr.aborted) {
            </span><span return</span><span ;
        }

        </span><span //</span><span  add submitting element to data if we know it</span>
        sub =<span  form.clk;
        </span><span if</span><span  (sub) {
            n </span>=<span  sub.name;
            </span><span if</span> (n && !<span sub.disabled) {
                s.extraData </span>= s.extraData ||<span  {};
                s.extraData[n] </span>=<span  sub.value;
                </span><span if</span> (sub.type == "image"<span ) {
                    s.extraData[n</span>+'.x'] =<span  form.clk_x;
                    s.extraData[n</span>+'.y'] =<span  form.clk_y;
                }
            }
        }
        
        </span><span var</span> CLIENT_TIMEOUT_ABORT = 1<span ;
        </span><span var</span> SERVER_ABORT = 2<span ;

        </span><span function</span><span  getDoc(frame) {
            </span><span var</span> doc = frame.contentWindow ? frame.contentWindow.document : frame.contentDocument ?<span  frame.contentDocument : frame.document;
            </span><span return</span><span  doc;
        }
        
        </span><span //</span><span  Rails CSRF hack (thanks to Yvan Barthelemy)</span>
        <span var</span> csrf_token = $('meta[name=csrf-token]').attr('content'<span );
        </span><span var</span> csrf_param = $('meta[name=csrf-param]').attr('content'<span );
        </span><span if</span> (csrf_param &&<span  csrf_token) {
            s.extraData </span>= s.extraData ||<span  {};
            s.extraData[csrf_param] </span>=<span  csrf_token;
        }

        </span><span //</span><span  take a breath so that pending repaints get some cpu time before the upload starts</span>
        <span function</span><span  doSubmit() {
            </span><span //</span><span  make sure form attrs are set</span>
            <span var</span> t = $form.attr('target'), a = $form.attr('action'<span );

            </span><span //</span><span  update form attrs in IE friendly way</span>
            form.setAttribute('target'<span ,id);
            </span><span if</span> (!<span method) {
                form.setAttribute(</span>'method', 'POST'<span );
            }
            </span><span if</span> (a !=<span  s.url) {
                form.setAttribute(</span>'action'<span , s.url);
            }

            </span><span //</span><span  ie borks in some cases when setting encoding</span>
            <span if</span> (! s.skipEncodingOverride && (!method || /post/<span i.test(method))) {
                $form.attr({
                    encoding: </span>'multipart/form-data'<span ,
                    enctype:  </span>'multipart/form-data'<span 
                });
            }

            </span><span //</span><span  support timout</span>
            <span if</span><span  (s.timeout) {
                timeoutHandle </span>= setTimeout(<span function</span>() { timedOut = <span true</span><span ; cb(CLIENT_TIMEOUT_ABORT); }, s.timeout);
            }
            
            </span><span //</span><span  look for server aborts</span>
            <span function</span><span  checkState() {
                </span><span try</span><span  {
                    </span><span var</span> state =<span  getDoc(io).readyState;
                    log(</span>'state = ' +<span  state);
                    </span><span if</span> (state && state.toLowerCase() == 'uninitialized'<span )
                        setTimeout(checkState,</span>50<span );
                }
                </span><span catch</span><span (e) {
                    log(</span>'Server abort: ' , e, ' (', e.name, ')'<span );
                    cb(SERVER_ABORT);
                    </span><span if</span><span  (timeoutHandle)
                        clearTimeout(timeoutHandle);
                    timeoutHandle </span>=<span  undefined;
                }
            }

            </span><span //</span><span  add "extra" data to form if provided in options</span>
            <span var</span> extraInputs =<span  [];
            </span><span try</span><span  {
                </span><span if</span><span  (s.extraData) {
                    </span><span for</span> (<span var</span> n <span in</span><span  s.extraData) {
                        </span><span if</span><span  (s.extraData.hasOwnProperty(n)) {
                           </span><span //</span><span  if using the $.param format that allows for multiple values with the same name</span>
                           <span if</span>($.isPlainObject(s.extraData[n]) && s.extraData[n].hasOwnProperty('name') && s.extraData[n].hasOwnProperty('value'<span )) {
                               extraInputs.push(
                               $(</span>'<input type="hidden" name="'+s.extraData[n].name+'">').attr('value'<span ,s.extraData[n].value)
                                   .appendTo(form)[</span>0<span ]);
                           } </span><span else</span><span  {
                               extraInputs.push(
                               $(</span>'<input type="hidden" name="'+n+'">').attr('value'<span ,s.extraData[n])
                                   .appendTo(form)[</span>0<span ]);
                           }
                        }
                    }
                }

                </span><span if</span> (!<span s.iframeTarget) {
                    </span><span //</span><span  add iframe to doc and submit the form</span>
                    $io.appendTo('body'<span );
                    </span><span if</span><span  (io.attachEvent)
                        io.attachEvent(</span>'onload'<span , cb);
                    </span><span else</span><span 
                        io.addEventListener(</span>'load', cb, <span false</span><span );
                }
                setTimeout(checkState,</span>15<span );
                form.submit();
            }
            </span><span finally</span><span  {
                </span><span //</span><span  reset attrs and remove "extra" input elements</span>
                form.setAttribute('action'<span ,a);
                </span><span if</span><span (t) {
                    form.setAttribute(</span>'target'<span , t);
                } </span><span else</span><span  {
                    $form.removeAttr(</span>'target'<span );
                }
                $(extraInputs).remove();
            }
        }

        </span><span if</span><span  (s.forceSync) {
            doSubmit();
        }
        </span><span else</span><span  {
            setTimeout(doSubmit, </span>10); <span //</span><span  this lets dom updates render</span>
<span         }

        </span><span var</span> data, doc, domCheckCount = 50<span , callbackProcessed;

        </span><span function</span><span  cb(e) {
            </span><span if</span> (xhr.aborted ||<span  callbackProcessed) {
                </span><span return</span><span ;
            }
            </span><span try</span><span  {
                doc </span>=<span  getDoc(io);
            }
            </span><span catch</span><span (ex) {
                log(</span>'cannot access response document: '<span , ex);
                e </span>=<span  SERVER_ABORT;
            }
            </span><span if</span> (e === CLIENT_TIMEOUT_ABORT &&<span  xhr) {
                xhr.abort(</span>'timeout'<span );
                </span><span return</span><span ;
            }
            </span><span else</span> <span if</span> (e == SERVER_ABORT &&<span  xhr) {
                xhr.abort(</span>'server abort'<span );
                </span><span return</span><span ;
            }

            </span><span if</span> (!doc || doc.location.href ==<span  s.iframeSrc) {
                </span><span //</span><span  response not received yet</span>
                <span if</span> (!<span timedOut)
                    </span><span return</span><span ;
            }
            </span><span if</span><span  (io.detachEvent)
                io.detachEvent(</span>'onload'<span , cb);
            </span><span else</span><span     
                io.removeEventListener(</span>'load', cb, <span false</span><span );

            </span><span var</span> status = 'success'<span , errMsg;
            </span><span try</span><span  {
                </span><span if</span><span  (timedOut) {
                    </span><span throw</span> 'timeout'<span ;
                }

                </span><span var</span> isXml = s.dataType == 'xml' || doc.XMLDocument ||<span  $.isXMLDoc(doc);
                log(</span>'isXml='+<span isXml);
                </span><span if</span> (!isXml && window.opera && (doc.body === <span null</span> || !<span doc.body.innerHTML)) {
                    </span><span if</span> (--<span domCheckCount) {
                        </span><span //</span><span  in some browsers (Opera) the iframe DOM is not always traversable when</span>
                        <span //</span><span  the onload callback fires, so we loop a bit to accommodate</span>
                        log('requeing onLoad callback, DOM not available'<span );
                        setTimeout(cb, </span>250<span );
                        </span><span return</span><span ;
                    }
                    </span><span //</span><span  let this fall through because server response could be an empty document</span>
                    <span //</span><span log('Could not access iframe DOM after mutiple tries.');</span>
                    <span //</span><span throw 'DOMException: not available';</span>
<span                 }

                </span><span //</span><span log('response detected');</span>
                <span var</span> docRoot = doc.body ?<span  doc.body : doc.documentElement;
                xhr.responseText </span>= docRoot ? docRoot.innerHTML : <span null</span><span ;
                xhr.responseXML </span>= doc.XMLDocument ?<span  doc.XMLDocument : doc;
                </span><span if</span><span  (isXml)
                    s.dataType </span>= 'xml'<span ;
                xhr.getResponseHeader </span>= <span function</span><span (header){
                    </span><span var</span> headers = {'content-type'<span : s.dataType};
                    </span><span return</span><span  headers[header];
                };
                </span><span //</span><span  support for XHR 'status' & 'statusText' emulation :</span>
                <span if</span><span  (docRoot) {
                    xhr.status </span>= Number( docRoot.getAttribute('status') ) ||<span  xhr.status;
                    xhr.statusText </span>= docRoot.getAttribute('statusText') ||<span  xhr.statusText;
                }

                </span><span var</span> dt = (s.dataType || ''<span ).toLowerCase();
                </span><span var</span> scr = /(json|script|text)/<span .test(dt);
                </span><span if</span> (scr ||<span  s.textarea) {
                    </span><span //</span><span  see if user embedded response in textarea</span>
                    <span var</span> ta = doc.getElementsByTagName('textarea')[0<span ];
                    </span><span if</span><span  (ta) {
                        xhr.responseText </span>=<span  ta.value;
                        </span><span //</span><span  support for XHR 'status' & 'statusText' emulation :</span>
                        xhr.status = Number( ta.getAttribute('status') ) ||<span  xhr.status;
                        xhr.statusText </span>= ta.getAttribute('statusText') ||<span  xhr.statusText;
                    }
                    </span><span else</span> <span if</span><span  (scr) {
                        </span><span //</span><span  account for browsers injecting pre around json response</span>
                        <span var</span> pre = doc.getElementsByTagName('pre')[0<span ];
                        </span><span var</span> b = doc.getElementsByTagName('body')[0<span ];
                        </span><span if</span><span  (pre) {
                            xhr.responseText </span>= pre.textContent ?<span  pre.textContent : pre.innerText;
                        }
                        </span><span else</span> <span if</span><span  (b) {
                            xhr.responseText </span>= b.textContent ?<span  b.textContent : b.innerText;
                        }
                    }
                }
                </span><span else</span> <span if</span> (dt == 'xml' && !xhr.responseXML &&<span  xhr.responseText) {
                    xhr.responseXML </span>=<span  toXml(xhr.responseText);
                }

                </span><span try</span><span  {
                    data </span>=<span  httpData(xhr, dt, s);
                }
                </span><span catch</span><span  (e) {
                    status </span>= 'parsererror'<span ;
                    xhr.error </span>= errMsg = (e ||<span  status);
                }
            }
            </span><span catch</span><span  (e) {
                log(</span>'error caught: '<span ,e);
                status </span>= 'error'<span ;
                xhr.error </span>= errMsg = (e ||<span  status);
            }

            </span><span if</span><span  (xhr.aborted) {
                log(</span>'upload aborted'<span );
                status </span>= <span null</span><span ;
            }

            </span><span if</span> (xhr.status) { <span //</span><span  we've set xhr.status</span>
                status = (xhr.status >= 200 && xhr.status < 300 || xhr.status === 304) ? 'success' : 'error'<span ;
            }

            </span><span //</span><span  ordering of these callbacks/triggers is odd, but that's how $.ajax does it</span>
            <span if</span> (status === 'success'<span ) {
                </span><span if</span><span  (s.success)
                    s.success.call(s.context, data, </span>'success'<span , xhr);
                </span><span if</span><span  (g)
                    $.event.trigger(</span>"ajaxSuccess"<span , [xhr, s]);
            }
            </span><span else</span> <span if</span><span  (status) {
                </span><span if</span> (errMsg ===<span  undefined)
                    errMsg </span>=<span  xhr.statusText;
                </span><span if</span><span  (s.error)
                    s.error.call(s.context, xhr, status, errMsg);
                </span><span if</span><span  (g)
                    $.event.trigger(</span>"ajaxError"<span , [xhr, s, errMsg]);
            }

            </span><span if</span><span  (g)
                $.event.trigger(</span>"ajaxComplete"<span , [xhr, s]);

            </span><span if</span> (g && ! --<span $.active) {
                $.event.trigger(</span>"ajaxStop"<span );
            }

            </span><span if</span><span  (s.complete)
                s.complete.call(s.context, xhr, status);

            callbackProcessed </span>= <span true</span><span ;
            </span><span if</span><span  (s.timeout)
                clearTimeout(timeoutHandle);

            </span><span //</span><span  clean up</span>
            setTimeout(<span function</span><span () {
                </span><span if</span> (!<span s.iframeTarget)
                    $io.remove();
                xhr.responseXML </span>= <span null</span><span ;
            }, </span>100<span );
        }

        </span><span var</span> toXml = $.parseXML || <span function</span>(s, doc) { <span //</span><span  use parseXML if available (jQuery 1.5+)</span>
            <span if</span><span  (window.ActiveXObject) {
                doc </span>= <span new</span> ActiveXObject('Microsoft.XMLDOM'<span );
                doc.async </span>= 'false'<span ;
                doc.loadXML(s);
            }
            </span><span else</span><span  {
                doc </span>= (<span new</span> DOMParser()).parseFromString(s, 'text/xml'<span );
            }
            </span><span return</span> (doc && doc.documentElement && doc.documentElement.nodeName != 'parsererror') ? doc : <span null</span><span ;
        };
        </span><span var</span> parseJSON = $.parseJSON || <span function</span><span (s) {
            </span><span /*</span><span jslint evil:true </span><span */</span>
            <span return</span> window['eval']('(' + s + ')'<span );
        };

        </span><span var</span> httpData = <span function</span>( xhr, type, s ) { <span //</span><span  mostly lifted from jq1.4.4</span>

            <span var</span> ct = xhr.getResponseHeader('content-type') || ''<span ,
                xml </span>= type === 'xml' || !type && ct.indexOf('xml') >= 0<span ,
                data </span>= xml ?<span  xhr.responseXML : xhr.responseText;

            </span><span if</span> (xml && data.documentElement.nodeName === 'parsererror'<span ) {
                </span><span if</span><span  ($.error)
                    $.error(</span>'parsererror'<span );
            }
            </span><span if</span> (s &&<span  s.dataFilter) {
                data </span>=<span  s.dataFilter(data, type);
            }
            </span><span if</span> (<span typeof</span> data === 'string'<span ) {
                </span><span if</span> (type === 'json' || !type && ct.indexOf('json') >= 0<span ) {
                    data </span>=<span  parseJSON(data);
                } </span><span else</span> <span if</span> (type === "script" || !type && ct.indexOf("javascript") >= 0<span ) {
                    $.globalEval(data);
                }
            }
            </span><span return</span><span  data;
        };
    }
};

</span><span /*</span><span *
 * ajaxForm() provides a mechanism for fully automating form submission.
 *
 * The advantages of using this method instead of ajaxSubmit() are:
 *
 * 1: This method will include coordinates for <input type="image" /> elements (if the element
 *    is used to submit the form).
 * 2. This method will include the submit element's name/value data (for the element that was
 *    used to submit the form).
 * 3. This method binds the submit() method to the form for you.
 *
 * The options argument for ajaxForm works exactly as it does for ajaxSubmit.  ajaxForm merely
 * passes the options argument along after properly binding events for submit elements and
 * the form itself.
 </span><span */</span><span 
$.fn.ajaxForm </span>= <span function</span><span (options) {
    options </span>= options ||<span  {};
    options.delegation </span>= options.delegation &&<span  $.isFunction($.fn.on);
    
    </span><span //</span><span  in jQuery 1.3+ we can fix mistakes with the ready state</span>
    <span if</span> (!options.delegation && <span this</span>.length === 0<span ) {
        </span><span var</span> o = { s: <span this</span>.selector, c: <span this</span><span .context };
        </span><span if</span> (!$.isReady &&<span  o.s) {
            log(</span>'DOM not ready, queuing ajaxForm'<span );
            $(</span><span function</span><span () {
                $(o.s,o.c).ajaxForm(options);
            });
            </span><span return</span> <span this</span><span ;
        }
        </span><span //</span><span  is your DOM ready?  http://docs.jquery.com/Tutorials:Introducing_$(document).ready()</span>
        log('terminating; zero elements found by selector' + ($.isReady ? '' : ' (DOM not ready)'<span ));
        </span><span return</span> <span this</span><span ;
    }

    </span><span if</span><span  ( options.delegation ) {
        $(document)
            .off(</span>'submit.form-plugin', <span this</span><span .selector, doAjaxSubmit)
            .off(</span>'click.form-plugin', <span this</span><span .selector, captureSubmittingElement)
            .on(</span>'submit.form-plugin', <span this</span><span .selector, options, doAjaxSubmit)
            .on(</span>'click.form-plugin', <span this</span><span .selector, options, captureSubmittingElement);
        </span><span return</span> <span this</span><span ;
    }

    </span><span return</span> <span this</span><span .ajaxFormUnbind()
        .bind(</span>'submit.form-plugin'<span , options, doAjaxSubmit)
        .bind(</span>'click.form-plugin'<span , options, captureSubmittingElement);
};

</span><span //</span><span  private event handlers    </span>
<span function</span><span  doAjaxSubmit(e) {
    </span><span /*</span><span jshint validthis:true </span><span */</span>
    <span var</span> options =<span  e.data;
    </span><span if</span> (!e.isDefaultPrevented()) { <span //</span><span  if event has been canceled, don't proceed</span>
<span         e.preventDefault();
        $(</span><span this</span><span ).ajaxSubmit(options);
    }
}
    
</span><span function</span><span  captureSubmittingElement(e) {
    </span><span /*</span><span jshint validthis:true </span><span */</span>
    <span var</span> target =<span  e.target;
    </span><span var</span> $el =<span  $(target);
    </span><span if</span> (!($el.is(":submit,input:image"<span ))) {
        </span><span //</span><span  is this a child element of the submit el?  (ex: a span within a button)</span>
        <span var</span> t = $el.closest(':submit'<span );
        </span><span if</span> (t.length === 0<span ) {
            </span><span return</span><span ;
        }
        target </span>= t[0<span ];
    }
    </span><span var</span> form = <span this</span><span ;
    form.clk </span>=<span  target;
    </span><span if</span> (target.type == 'image'<span ) {
        </span><span if</span> (e.offsetX !==<span  undefined) {
            form.clk_x </span>=<span  e.offsetX;
            form.clk_y </span>=<span  e.offsetY;
        } </span><span else</span> <span if</span> (<span typeof</span> $.fn.offset == 'function'<span ) {
            </span><span var</span> offset =<span  $el.offset();
            form.clk_x </span>= e.pageX -<span  offset.left;
            form.clk_y </span>= e.pageY -<span  offset.top;
        } </span><span else</span><span  {
            form.clk_x </span>= e.pageX -<span  target.offsetLeft;
            form.clk_y </span>= e.pageY -<span  target.offsetTop;
        }
    }
    </span><span //</span><span  clear form vars</span>
    setTimeout(<span function</span>() { form.clk = form.clk_x = form.clk_y = <span null</span>; }, 100<span );
}


</span><span //</span><span  ajaxFormUnbind unbinds the event handlers that were bound by ajaxForm</span>
$.fn.ajaxFormUnbind = <span function</span><span () {
    </span><span return</span> <span this</span>.unbind('submit.form-plugin click.form-plugin'<span );
};

</span><span /*</span><span *
 * formToArray() gathers form element data into an array of objects that can
 * be passed to any of the following ajax functions: $.get, $.post, or load.
 * Each object in the array has both a 'name' and 'value' property.  An example of
 * an array for a simple login form might be:
 *
 * [ { name: 'username', value: 'jresig' }, { name: 'password', value: 'secret' } ]
 *
 * It is this array that is passed to pre-submit callback functions provided to the
 * ajaxSubmit() and ajaxForm() methods.
 </span><span */</span><span 
$.fn.formToArray </span>= <span function</span><span (semantic, elements) {
    </span><span var</span> a =<span  [];
    </span><span if</span> (<span this</span>.length === 0<span ) {
        </span><span return</span><span  a;
    }

    </span><span var</span> form = <span this</span>[0<span ];
    </span><span var</span> els = semantic ? form.getElementsByTagName('*'<span ) : form.elements;
    </span><span if</span> (!<span els) {
        </span><span return</span><span  a;
    }

    </span><span var</span><span  i,j,n,v,el,max,jmax;
    </span><span for</span>(i=0, max=els.length; i < max; i++<span ) {
        el </span>=<span  els[i];
        n </span>=<span  el.name;
        </span><span if</span> (!<span n) {
            </span><span continue</span><span ;
        }

        </span><span if</span> (semantic && form.clk && el.type == "image"<span ) {
            </span><span //</span><span  handle image inputs on the fly when semantic == true</span>
            <span if</span>(!el.disabled && form.clk ==<span  el) {
                a.push({name: n, value: $(el).val(), type: el.type });
                a.push({name: n</span>+'.x', value: form.clk_x}, {name: n+'.y'<span , value: form.clk_y});
            }
            </span><span continue</span><span ;
        }

        v </span>= $.fieldValue(el, <span true</span><span );
        </span><span if</span> (v && v.constructor ==<span  Array) {
            </span><span if</span><span  (elements) 
                elements.push(el);
            </span><span for</span>(j=0, jmax=v.length; j < jmax; j++<span ) {
                a.push({name: n, value: v[j]});
            }
        }
        </span><span else</span> <span if</span> (feature.fileapi && el.type == 'file' && !<span el.disabled) {
            </span><span if</span><span  (elements) 
                elements.push(el);
            </span><span var</span> files =<span  el.files;
            </span><span if</span><span  (files.length) {
                </span><span for</span> (j=0; j < files.length; j++<span ) {
                    a.push({name: n, value: files[j], type: el.type});
                }
            }
            </span><span else</span><span  {
                </span><span //</span><span  #180</span>
                a.push({ name: n, value: ''<span , type: el.type });
            }
        }
        </span><span else</span> <span if</span> (v !== <span null</span> && <span typeof</span> v != 'undefined'<span ) {
            </span><span if</span><span  (elements) 
                elements.push(el);
            a.push({name: n, value: v, type: el.type, required: el.required});
        }
    }

    </span><span if</span> (!semantic &&<span  form.clk) {
        </span><span //</span><span  input type=='image' are not found in elements array! handle it here</span>
        <span var</span> $input = $(form.clk), input = $input[0<span ];
        n </span>=<span  input.name;
        </span><span if</span> (n && !input.disabled && input.type == 'image'<span ) {
            a.push({name: n, value: $input.val()});
            a.push({name: n</span>+'.x', value: form.clk_x}, {name: n+'.y'<span , value: form.clk_y});
        }
    }
    </span><span return</span><span  a;
};

</span><span /*</span><span *
 * Serializes form data into a 'submittable' string. This method will return a string
 * in the format: name1=value1&amp;name2=value2
 </span><span */</span><span 
$.fn.formSerialize </span>= <span function</span><span (semantic) {
    </span><span //</span><span hand off to jQuery.param for proper encoding</span>
    <span return</span> $.param(<span this</span><span .formToArray(semantic));
};

</span><span /*</span><span *
 * Serializes all field elements in the jQuery object into a query string.
 * This method will return a string in the format: name1=value1&amp;name2=value2
 </span><span */</span><span 
$.fn.fieldSerialize </span>= <span function</span><span (successful) {
    </span><span var</span> a =<span  [];
    </span><span this</span>.each(<span function</span><span () {
        </span><span var</span> n = <span this</span><span .name;
        </span><span if</span> (!<span n) {
            </span><span return</span><span ;
        }
        </span><span var</span> v = $.fieldValue(<span this</span><span , successful);
        </span><span if</span> (v && v.constructor ==<span  Array) {
            </span><span for</span> (<span var</span> i=0,max=v.length; i < max; i++<span ) {
                a.push({name: n, value: v[i]});
            }
        }
        </span><span else</span> <span if</span> (v !== <span null</span> && <span typeof</span> v != 'undefined'<span ) {
            a.push({name: </span><span this</span><span .name, value: v});
        }
    });
    </span><span //</span><span hand off to jQuery.param for proper encoding</span>
    <span return</span><span  $.param(a);
};

</span><span /*</span><span *
 * Returns the value(s) of the element in the matched set.  For example, consider the following form:
 *
 *  
 *
 *  var v = $(':text').fieldValue();
 *  // if no values are entered into the text inputs
 *  v == ['','']
 *  // if values entered into the text inputs are 'foo' and 'bar'
 *  v == ['foo','bar']
 *
 *  var v = $(':checkbox').fieldValue();
 *  // if neither checkbox is checked
 *  v === undefined
 *  // if both checkboxes are checked
 *  v == ['B1', 'B2']
 *
 *  var v = $(':radio').fieldValue();
 *  // if neither radio is checked
 *  v === undefined
 *  // if first radio is checked
 *  v == ['C1']
 *
 * The successful argument controls whether or not the field element must be 'successful'
 * (per http://www.w3.org/TR/html4/interact/forms.html#successful-controls).
 * The default value of the successful argument is true.  If this value is false the value(s)
 * for each element is returned.
 *
 * Note: This method *always* returns an array.  If no valid value can be determined the
 *    array will be empty, otherwise it will contain one or more values.
 </span><span */</span><span 
$.fn.fieldValue </span>= <span function</span><span (successful) {
    </span><span for</span> (<span var</span> val=[], i=0, max=<span this</span>.length; i < max; i++<span ) {
        </span><span var</span> el = <span this</span><span [i];
        </span><span var</span> v =<span  $.fieldValue(el, successful);
        </span><span if</span> (v === <span null</span> || <span typeof</span> v == 'undefined' || (v.constructor == Array && !<span v.length)) {
            </span><span continue</span><span ;
        }
        </span><span if</span> (v.constructor ==<span  Array)
            $.merge(val, v);
        </span><span else</span><span 
            val.push(v);
    }
    </span><span return</span><span  val;
};

</span><span /*</span><span *
 * Returns the value of the field element.
 </span><span */</span><span 
$.fieldValue </span>= <span function</span><span (el, successful) {
    </span><span var</span> n = el.name, t = el.type, tag =<span  el.tagName.toLowerCase();
    </span><span if</span> (successful ===<span  undefined) {
        successful </span>= <span true</span><span ;
    }

    </span><span if</span> (successful && (!n || el.disabled || t == 'reset' || t == 'button' ||<span 
        (t </span>== 'checkbox' || t == 'radio') && !el.checked ||<span 
        (t </span>== 'submit' || t == 'image') && el.form && el.form.clk != el ||<span 
        tag </span>== 'select' && el.selectedIndex == -1<span )) {
            </span><span return</span> <span null</span><span ;
    }

    </span><span if</span> (tag == 'select'<span ) {
        </span><span var</span> index =<span  el.selectedIndex;
        </span><span if</span> (index < 0<span ) {
            </span><span return</span> <span null</span><span ;
        }
        </span><span var</span> a = [], ops =<span  el.options;
        </span><span var</span> one = (t == 'select-one'<span );
        </span><span var</span> max = (one ? index+1<span  : ops.length);
        </span><span for</span>(<span var</span> i=(one ? index : 0); i < max; i++<span ) {
            </span><span var</span> op =<span  ops[i];
            </span><span if</span><span  (op.selected) {
                </span><span var</span> v =<span  op.value;
                </span><span if</span> (!v) { <span //</span><span  extra pain for IE...</span>
                    v = (op.attributes && op.attributes['value'] && !(op.attributes['value'].specified)) ?<span  op.text : op.value;
                }
                </span><span if</span><span  (one) {
                    </span><span return</span><span  v;
                }
                a.push(v);
            }
        }
        </span><span return</span><span  a;
    }
    </span><span return</span><span  $(el).val();
};

</span><span /*</span><span *
 * Clears the form data.  Takes the following actions on the form's input fields:
 *  - input text fields will have their 'value' property set to the empty string
 *  - select elements will have their 'selectedIndex' property set to -1
 *  - checkbox and radio inputs will have their 'checked' property set to false
 *  - inputs of type submit, button, reset, and hidden will *not* be effected
 *  - button elements will *not* be effected
 </span><span */</span><span 
$.fn.clearForm </span>= <span function</span><span (includeHidden) {
    </span><span return</span> <span this</span>.each(<span function</span><span () {
        $(</span>'input,select,textarea', <span this</span><span ).clearFields(includeHidden);
    });
};

</span><span /*</span><span *
 * Clears the selected form elements.
 </span><span */</span><span 
$.fn.clearFields </span>= $.fn.clearInputs = <span function</span><span (includeHidden) {
    </span><span var</span> re = /^(?:color|date|datetime|email|month|number|password|range|search|tel|text|time|url|week)$/i; <span //</span><span  'hidden' is not in this list</span>
    <span return</span> <span this</span>.each(<span function</span><span () {
        </span><span var</span> t = <span this</span>.type, tag = <span this</span><span .tagName.toLowerCase();
        </span><span if</span> (re.test(t) || tag == 'textarea'<span ) {
            </span><span this</span>.value = ''<span ;
        }
        </span><span else</span> <span if</span> (t == 'checkbox' || t == 'radio'<span ) {
            </span><span this</span>.checked = <span false</span><span ;
        }
        </span><span else</span> <span if</span> (tag == 'select'<span ) {
            </span><span this</span>.selectedIndex = -1<span ;
        }
        </span><span else</span> <span if</span><span  (includeHidden) {
            </span><span //</span><span  includeHidden can be the value true, or it can be a selector string</span>
            <span //</span><span  indicating a special test; for example:</span>
            <span //</span><span   $('#myForm').clearForm('.special:hidden')</span>
            <span //</span><span  the above would clean hidden inputs that have the class of 'special'</span>
            <span if</span> ( (includeHidden === <span true</span> && /hidden/.test(t)) ||<span 
                 (</span><span typeof</span> includeHidden == 'string' && $(<span this</span><span ).is(includeHidden)) )
                </span><span this</span>.value = ''<span ;
        }
    });
};

</span><span /*</span><span *
 * Resets the form data.  Causes all form elements to be reset to their original value.
 </span><span */</span><span 
$.fn.resetForm </span>= <span function</span><span () {
    </span><span return</span> <span this</span>.each(<span function</span><span () {
        </span><span //</span><span  guard against an input with the name of 'reset'</span>
        <span //</span><span  note that IE reports the reset function as an 'object'</span>
        <span if</span> (<span typeof</span> <span this</span>.reset == 'function' || (<span typeof</span> <span this</span>.reset == 'object' && !<span this</span><span .reset.nodeType)) {
            </span><span this</span><span .reset();
        }
    });
};

</span><span /*</span><span *
 * Enables or disables any matching elements.
 </span><span */</span><span 
$.fn.enable </span>= <span function</span><span (b) {
    </span><span if</span> (b ===<span  undefined) {
        b </span>= <span true</span><span ;
    }
    </span><span return</span> <span this</span>.each(<span function</span><span () {
        </span><span this</span>.disabled = !<span b;
    });
};

</span><span /*</span><span *
 * Checks/unchecks any matching checkboxes or radio buttons and
 * selects/deselects and matching option elements.
 </span><span */</span><span 
$.fn.selected </span>= <span function</span><span (select) {
    </span><span if</span> (select ===<span  undefined) {
        select </span>= <span true</span><span ;
    }
    </span><span return</span> <span this</span>.each(<span function</span><span () {
        </span><span var</span> t = <span this</span><span .type;
        </span><span if</span> (t == 'checkbox' || t == 'radio'<span ) {
            </span><span this</span>.checked =<span  select;
        }
        </span><span else</span> <span if</span> (<span this</span>.tagName.toLowerCase() == 'option'<span ) {
            </span><span var</span> $sel = $(<span this</span>).parent('select'<span );
            </span><span if</span> (select && $sel[0] && $sel[0].type == 'select-one'<span ) {
                </span><span //</span><span  deselect all other options</span>
                $sel.find('option').selected(<span false</span><span );
            }
            </span><span this</span>.selected =<span  select;
        }
    });
};

</span><span //</span><span  expose debug var</span>
$.fn.ajaxSubmit.debug = <span false</span><span ;

</span><span //</span><span  helper fn for console logging</span>
<span function</span><span  log() {
    </span><span if</span> (!<span $.fn.ajaxSubmit.debug) 
        </span><span return</span><span ;
    </span><span var</span> msg = '[jquery.form] ' + Array.prototype.join.call(arguments,''<span );
    </span><span if</span> (window.console &&<span  window.console.log) {
        window.console.log(msg);
    }
    </span><span else</span> <span if</span> (window.opera &&<span  window.opera.postError) {
        window.opera.postError(msg);
    }
}

})(jQuery);</span></pre>

<p> </p>









		
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