javascript实现暂停

<!DOCTYPE HTML>
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
</head>

function Pause(s,f){
   this.GoOn = function(n,s){
       if(n == 0){
           setTimeout(function(){GoOn(1,s);},s);
       } else{
           f();
       }
   }
   this.GoOn(0,s);
}

function testMethod(){
   alert("等待5秒");
   Pause(5000,function(){
       alert("结束！");
   });
}

</script>
<a onclick="testMethod();">开始</a>
</body>
</html>