跨浏览器事件对象封装

封装一个能够隔离浏览器差异的JavaScript库EventUtil，主要是使用能力检测。

var EventUtil={
    addHandler:function(element,type,handler){
        if(element.addEventListener){ 
            element.addEventListener(type,handler,false);
        }else if(element.attachEvent){
            element.attachEvent('on'+type,handler);
        }else{
            element['on'+type]=handler;
        }
    },
    getEvent:function(event){
        return event?event :window.event;
    },
    getTarget:function(){
        return event.target | event.srcElement;
    },
    preventDefault:function(event){
        if(event.preventDefault){
            event.preventDefault();
        }else{
            event.returnValue=false;
        }
    },
    removeHandler:function(element,type,handler){
        if(element.removeEventListener){
            element.removeEventListener(type,handler,false);
        }else if(element.detachEvent){
            element.detachEvent('on'+type,handler);
        }else{
            element['on'+type]=null;
        }
    },
    stopPropagation:function(event){
        if(event.stopPropagation){
            event.stopPropagation();
        }else{
            event.cancelBubble=true;
        }
    }
};

View Code