c#响应Enter键事件

windows窗体
this.cancelButton = this.button1;//设置Esc键
this.AcceptButton = this.button2;//设置Enter键
web页面
<script type="text/javascript" language="javascript">
    function document.onkeydown()//响应Enter事件
    {
        if(event.keyCode == 13)
        document.all("Button1").click();//设置要响应的的button
    }
    </script>
<body onkeydown="if(event.keyCode==13) return false;">