2、将下面代码存为menu.js文件，并与menu.htm放到同级目录下 代码如下: //Pop-it menu- By Dynamic Drive - Modified by Wbird //For full source code and more DHTML scripts, visit http://www.gyct.cn //This credit MUST stay intact for use var menuOffX=0 //菜单距连接文字最左端距离 var menuOffY=18 //菜单距连接文字顶端距离 var vBobjects = new Array(); var fo_shadows=new Array(); ////No need to edit beyond here var ie4=document.all&&navigator.userAgent.indexOf("Opera")==-1 var ns6=document.getElementById&&!document.all var ns4=document.layers
function MM_findObj(n, d) { var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) { d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[n];
function fetch_object(idname, forcefetch) { if (typeof(vBobjects[idname]) == "undefined") { vBobjects[idname] = MM_findObj(idname); } return vBobjects[idname]; } //showmenu vmenu:内容，允许为空,vmenuobj DIV数据ID，MOD 0=关闭浏览器自适应，用于版面导航菜单 function showmenu(e,vmenu,vmenuobj,mod){ if (!document.all&&!document.getElementById&&!document.layers) return var which=vmenu; if (vmenuobj) { var MenuObj = fetch_object(vmenuobj); if (MenuObj) { which = MenuObj.innerHTML; } } if (!which) { return } clearhidemenu(); ie_clearshadow(); menuobj=ie4? document.all.popmenu : ns6? document.getElementById("popmenu") : ns4? document.popmenu : "" menuobj.thestyle=(ie4||ns6)? menuobj.style : menuobj if (ie4||ns6) menuobj.innerHTML=which else{ menuobj.document.write('<layer name=gui bgcolor="#E6E6E6" width="165" onmouseover="clearhidemenu()" onmouseout="hidemenu()">'+which+'</layer>') menuobj.document.close() } menuobj.contentwidth=(ie4||ns6)? menuobj.offsetWidth : menuobj.document.gui.document.width menuobj.contentheight=(ie4||ns6)? menuobj.offsetHeight : menuobj.document.gui.document.height eventX=ie4? event.clientX : ns6? e.clientX : e.x eventY=ie4? event.clientY : ns6? e.clientY : e.y var rightedge=ie4? document.body.clientWidth-eventX : window.innerWidth-eventX var bottomedge=ie4? document.body.clientHeight-eventY : window.innerHeight-eventY var getlength if (rightedge<menuobj.contentwidth){ getlength=ie4? document.body.scrollLeft+eventX-menuobj.contentwidth+menuOffX : ns6? window.pageXOffset+eventX-menuobj.contentwidth : eventX-menuobj.contentwidth }else{ getlength=ie4? ie_x(event.srcElement)+menuOffX : ns6? window.pageXOffset+eventX : eventX } menuobj.thestyle.left=getlength+'px' if (bottomedge<menuobj.contentheight&&mod!=0){ getlength=ie4? document.body.scrollTop+eventY-menuobj.contentheight-event.offsetY+menuOffY-23 : ns6? window.pageYOffset+eventY-menuobj.contentheight-10 : eventY-menuobj.contentheight } else{ getlength=ie4? ie_y(event.srcElement)+menuOffY : ns6? window.pageYOffset+eventY+10 : eventY } menuobj.thestyle.top=getlength+'px' menuobj.thestyle.visibility="visible" ie_dropshadow(menuobj,"#999999",3) return false }
function ie_y(e){ var t=e.offsetTop; while(e=e.offsetParent){ t+=e.offsetTop; } return t; } function ie_x(e){ var l=e.offsetLeft; while(e=e.offsetParent){ l+=e.offsetLeft; } return l; } function ie_dropshadow(el, color, size) { var i; for (i=size; i>0; i--) { var rect = document.createElement('div'); var rs = rect.style rs.position = 'absolute'; rs.left = (el.style.posLeft + i) + 'px'; rs.top = (el.style.posTop + i) + 'px'; rs.width = el.offsetWidth + 'px'; rs.height = el.offsetHeight + 'px'; rs.zIndex = el.style.zIndex - i; rs.backgroundColor = color; var opacity = 1 - i / (i + 1); rs.filter = 'alpha(opacity=' + (100 * opacity) + ')'; //el.insertAdjacentElement('afterEnd', rect); fo_shadows[fo_shadows.length] = rect; } } function ie_clearshadow() { for(var i=0;i<fo_shadows.length;i++) { if (fo_shadows[i]) fo_shadows[i].style.display="none" } fo_shadows=new Array(); } function contains_ns6(a, b) { while (b.parentNode) if ((b = b.parentNode) == a) return true; return false; }
function hidemenu(){ if (window.menuobj) menuobj.thestyle.visibility=(ie4||ns6)? "hidden" : "hide" ie_clearshadow() }
function dynamichide(e){ if (ie4&&!menuobj.contains(e.toElement)) hidemenu() else if (ns6&&e.currentTarget!= e.relatedTarget&& !contains_ns6(e.currentTarget, e.relatedTarget)) hidemenu() }
function delayhidemenu(){ if (ie4||ns6||ns4) delayhide=setTimeout("hidemenu()",500) }
function clearhidemenu(){ if (window.delayhide) clearTimeout(delayhide) } function highlightmenu(e,state){ if (document.all) source_el=event.srcElement else if (document.getElementById) source_el=e.target if (source_el.className=="menuitems"){ source_el.id=(state=="on")? "mouseoverstyle" : "" } else{ while(source_el.id!="popmenu"){ source_el=document.getElementById? source_el.parentNode : source_el.parentElement if (source_el.className=="menuitems"){ source_el.id=(state=="on")? "mouseoverstyle" : "" } } } }
