IE火狐中获取KeyCode

<script language="javascript">
   function onKeyPressBlockNumbers(e)
   {
      var key = window.event ? e.keyCode:e.which;
      alert(key);
   }
</script>
<input type="text" onkeypress="return onKeyPressBlockNumbers(event);" />

转载于:https://www.cnblogs.com/lanlingpeng/archive/2012/08/27/2658478.html