Javascript 偵測到按下[Enter] 鍵時, 就送出表單

<script src="jquery-1.7.1.min.js" ></script>
<script language=javascript>
 $(document).ready(function(){

$(document).keypress(function(event) {
 if ( event.which == 13 ) {
   $("#login").submit();
}

   });
 });
</script>