事件绑定完整版2016/4/21

 function fn1()
 {
 alert(1)
 }
 function fn2()
 {
	alert(this)
 }
 function blind(obj,evname,fn)
 {
	if(obj.attachEvent)
	{
		obj.attachEvent('on'+evname,function()
			{
				fn.call(obj);
			}
		);
		
	}
	else
	{
		obj.addEventListener(evname,fn,false);
	}
 };
 blind(document,'click',fn1);