这样?
<body bgcolor="#FFFFFF" onclick="kiss()">
<a href="#" onclick="document.all.b1.disabled = false">ccccccccccccc</a><button id="b1" disabled>gooooo</button><br>
<script language="JavaScript">
<!--
function kiss()
{
if(event.srcElement.tagName != "A")
document.all.b1.disabled = true;
}
//-->
</script>
</body>
<body bgcolor="#FFFFFF" onclick="kiss()">
<a href="#" onclick="document.all.b1.disabled = false">ccccccccccccc</a><button id="b1" disabled>gooooo</button><br>
<script language="JavaScript">
<!--
function kiss()
{
if(event.srcElement.tagName != "A")
document.all.b1.disabled = true;
}
//-->
</script>
</body>
function yourfuncname(){
if(!document.all){
return;
}.....//your code here
}
{
//your code here
}