JavaScript高级程序设计阅读笔记（十八）js跨平台的事件_javascript技巧

var EventUtil={
addEventHandler:function(oTarget, sEventType, fnHandler){
if(oTarget.addEventListener){
oTarget.addEventListener(sEventType,fnHandler,false);
} else if(oTarget.attachEvent){
oTarget.attachEvent("on"+sEventType,fnHandler);
} else{
oTarget["on"+sEventType]=fnHandler;
}
},
removeEventHandler:function(oTarget, sEventType, fnHandler){
if(oTarget.removeEventListener){
oTarget.removeEventListener(sEventType,fnHandler);
} else if(oTarget.detachEvent){
oTarget.detachEvent("on"+sEventType,fnHandler);
} else{
oTarget["on"+sEventType]=null;
}
},
formatEvent:function(oEvent){
var isIE=/msie/i.test(navigator.userAgent),
isWin=/win/i.test(navigator.userAgent);
if(isIE && isWin){
oEvent.charCode=(oEvent.type == "keypress")?oEvent.keyCode:0;
oEvent.eventPhase =2;
oEvent.isChar=(oEvent.charCode>0);
oEvent.pageX=oEvent.clientX+document.body.scrollLeft;
oEvent.pageY=oEvent.clientY+document.body.scrollTop;
oEvent.preventDefault=function(){
this.returnvalue=false;
}
if(oEvent.type == "mouseout"){
oEvent.relateTarget=oEvent.toElement;
}else if(oEvent.type=="mouseover"){
oEvent.relatedTarget=oEvent.fromElement;
}
oEvent.stopPropagation=function(){
this.cancelBubble=true;
}
oEvent.target=oEvent.srcElement;
oEvent.time=(new Date()).getTime();
}
return oEvent;
},
getEvent:function(){
if(window.event){
return this.formatEvent(window.event);
}else{
return EventUtil.getEvent.caller.arguments[0];
}
}
}