如何让程序检测你的按键，实现WEB热键功能呢？
以下是代码：
<html><br />
<head><br />
<script language='<a href="http://www.chinaitpower.com/Dev/Programme/Java/index.html" target="_blank">java</a>script'><br />
<!--<br />
function issueCommand(x){<br />
if (document.layers)<br />
{<br />
if (x.which==99||x.which==67)<br />
window.close();<br />
else if (event.keyCode==112||event.keyCode==80)<br />
self.print();<br />
else if (event.keyCode==110||event.keyCode==78)<br />
alert("Sorry, this is the only song in the List");<br />
}<br />
else if (document.all){<br />
<br />
if (event.keyCode==99||event.keyCode==67)<br />
window.close();<br />
else if (event.keyCode==112||event.keyCode==80)<br />
self.print();<br />
else if (event.keyCode==110||event.keyCode==78)<br />
alert("Sorry, this is the only song in the List");<br />
}<br />
<br />
}<br />
<br />
<br />
//--><br />
</script><br />
</head><br />
<br />
<body><br />
<script language='<a href="http://www.chinaitpower.com/Dev/Programme/Java/index.html" target="_blank">java</a>script'><br />
<!--<br />
if (document.layers)<br />
document.captureEvents(Event.KEYPRESS);<br />
<br />
document.onkeypress=issueCommand<br />
<br />
--><br />
</script><br />
<br />
<font size=6><u>P</u>ress P</font><p><br />
<br />
<font size=6><u>N</u>ext One</font><p><br />
<br />
<font size=6><u>C</u>lose Window</font><p><br />
</body><br />
</html><br />
[Ctrl+A 全选 Ctrl+C 复制]