js回车事件

<intput type="text" onkeydown="Click()">
<script type="text/javascript">
   function Click(){
     if(event.keyCode == 13){ //按下回车键
        //do something
     }
}
</script>
或者：
<input type="text" onkeydown="if(event.keyCode==13){Click()}">
<script type="text/javascript">
    function Click(){
      //do something
    }
</script>