创建IE各版本专属CSS方法

IE下专属CSS：

<![if !IE]>
<link rel="stylesheet" type="text/css" href="NOT-IE.css" />
<![endif]>

IE 6 ONLY:

<!--[if IE 6]>
<link rel="stylesheet" type="text/css" href="IE-6-SPECIFIC.css" />
<![endif]-->

IE 5 ONLY:

<!--[if IE 5]>
<link rel="stylesheet" type="text/css" href="IE-5-SPECIFIC.css" />
<![endif]-->

IE 5.5 ONLY:

<!--[if IE 5.5000]>
<link rel="stylesheet" type="text/css" href="IE-55-SPECIFIC.css" />
<![endif]-->

IE6或更低:

<!--[if lte IE 7]>
<link rel="stylesheet" type="text/css" href="IE-6-OR-LOWER-SPECIFIC.css" />
<![endif]-->

非IE:

<![if !IE]>
<link rel="stylesheet" type="text/css" href="REAL-STYLESHET.css" />
<![endif]>