方法一：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
方法二：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript" src="http://www.chenfahui.cn/ziliao/js/jquery-1.4.1.min.js"></script>
<title>判断浏览器否为IE6</title>
</head>
<body>
<script type="text/javascript">
function ietester2 (){
if($.browser.msie&&($.browser.version == "6.0")&&!$.support.style ){
alert("IE6")
}
else{
alert("非IE6")
}
};
</script>
<input value="点击测试" type="button" onclick="ietester2()" />
</body>
</html>