自己的js工具 Event封装

因为ie的event是全局的而firefox的event是局部的,用起来不太方便,这个时候我们就要自己组装一下常用的event操作了,封装成类便于重用

/** 
类 Event 
用法: 
Event.getEvent();获取 ie,firefox的event 
Event.getTarget();获取ie的srcElement或firefox的target 
Event.isIe();是否为ie 
Event.clientX(); 获取ie,fox的鼠标x坐标 
Event.clientY();获取 ie,fox的鼠标y坐标 
*/ 
var Event=new function(){ 
this.toString=function(){ 
return this.getEvent(); 
} 
//获取 事件 
this.getEvent=function(){ 
var ev=window.event; 
if(!ev){ 
var c=this.getEvent.caller; 
while(c){ 
ev=c.arguments[0]; 
if(ev && Event ==ev.constructor) 
break; 
c=c.caller; 
} 
} 
return ev; 
}; 
//获取 事件源 
this.getTarget=function(){ 
var ev=this.getEvent(); 
return this.isIe()?ev.srcElement:ev.target; 
} 
//是否为ie 
this.isIe=function(){ 
return document.all?true:false; 
} 
//鼠标x坐标 
this.clientX=function(){ 
var ev=this.getEvent(); 
var x=this.isIe()?ev.clientX:ev.pageX; 
return x; 
} 
//鼠标y坐标 
this.clientY=function(){ 
var ev=this.getEvent(); 
var y=this.isIe()?ev.clientY:ev.pageY; 
return y; 
} 
/**增加事件(对象,事件类型,函数指针 ) 
obj: html对象 
sEvent: 事件名称 
spNotify: 事件执行的方法 
isCapture:是否允许全屏捕捉 
*/ 
this.addEvent=function(obj,sEvent,fpNotify,isCapture){ 
sEvent=sEvent.indexOf("on")!=-1?sEvent:"on"+sEvent; 
if(obj.addEventListener){ 
sEvent=sEvent.substring(sEvent.indexOf("on")+2); 
obj.addEventListener(sEvent,fpNotify,isCapture); 
}else{ //ie 
if(isCapture) 
obj.setCapture(isCapture); 
obj.attachEvent(sEvent,fpNotify); 
} 
} 
//移除事件 
this.removeEvent=function(obj,sEvent,fpNotify){ 
if(obj.removeEventListener){ 
sEvent=sEvent.substring(sEvent.indexOf("on")+2) 
obj.removeEventListener(sEvent,fpNotify,false); 
}else{ 
obj.detachEvent(sEvent,fpNotify); 
} 
} 
//获取鼠标按键,left=1,middle=2,right=3 
this.button=function(){ 
var ev=this.getEvent(); 
if(!ev.which&&ev.button){//ie 
return ev.button&1?1:(ev.button&2?3:(ev.button&4?2:0)) 
} 
return ev.which; 
}; 
//阻止事件冒泡传递 
this.stopPropagation=function(){ 
var ev=this.getEvent(); 
if(this.isIe) 
ev.cancelBubble=true; 
else 
ev.stopPropagation(); 
} 
//阻止默认事件返回 
this.preventDefault=function(){ 
var ev=this.getEvent(); 
if(this.isIe) 
ev.returnValue=false; 
else 
ev.preventDefault(); 
} 
}