帮忙解释一下这句话啊？谢谢

Question

<script LANGUAGE="javascript" FOR="DHTMLSafe1" EVENT="onclick"> 
alert();
</script>
<input type="button" id="DHTMLSafe1">

Answer 1

看看MSDN
http://msdn.microsoft.com/workshop/author/dhtml/reference/properties/event.asp

Answer 2

<script LANGUAGE="javascript" FOR="DHTMLSafe1" EVENT="ShowContextMenu"> 
   return ShowMenu(1);
</script>含义:
页面中有一个名为DHTMLSafe1控件,此段代码是专为该对象的ShowContextMenu事件设计的,即当该控件触发ShowContextMenu事件进,将执行该段代码.