IE7 detection, issues, redirect ?

hi there, i've made site looks crap on ie7 (of course),
i'd detect ie7 , redirect page tells users to
upgrade browsers.
know can provide alternate stylesheet ie7 users, for
specific site, i'd redirect page i've made that
notification on it.


also, reason, this:

code:

<!--[if lte ie 7]<link rel="stylesheet" href="ie7.css"/>[endif]-->

doesn't seem work...

 

right, tried various different methods, 1 worked this:

code:

<script language="javascript"><!--  if (navigator.useragent.tolowercase().indexof('7.0') != -1) {  document.write("<link rel='stylesheet' href='ie7.css' type='text/css'>");  }    // --></script>

 

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