【前端积累】常用事件的js公用方法

 var eventUtil={
              // 添加句柄
              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;
                }
              },
              // 删除句柄
              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;
                }
              },
           getEvent:function(event){
             return event?event:window.event;
           },
           getType:function(event){
             return event.type;
           },
           getElement:function(event){
             return event.target || event.srcElement;
           },
           preventDefault:function(event){
             if(event.preventDefault){
               event.preventDefault();
             }else{
               event.returnValue=false;
             }
           },
          stopPropagation:function(event){
            if(event.stopPropagation){
              event.stopPropagation();
            }else{
              event.cancelBubble=true;
            }
          }
   }