<script language="javascript">
function test()
{
if(event.keyCode==13)
{
alert("你按了回车")
}
}
</script>
<body onkeydown="test()"><script language="javascript">
function test()
{
if(event.keyCode==13)
{
alert("你按了回车")
}
}
</script>
<body onkeydown="test()">