JS事件监听的兼容写法

			addEvent(goal,fn,'click',false);
			function addEvent(obj,fn,even,boolean){//封装一个自己的方法
				if(obj.addEventListener){
					obj.addEventListener(even,fn,boolean)
				}
				else{
					ev='on'+even;
					obj.attachEvent(ev,fn);
				}
			}

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转载自blog.csdn.net/Anoddguy/article/details/82191989