判断是否为IE浏览器
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
</head>
<body>
<script type="text/javascript">
if(navigator.userAgent.indexOf( 'MSIE' ) != -1){
alert('这是IE');
}else{
alert('这不是IE');
}
</script>
</body>
</html>
