var Browser = {  
	Version: function() {    var version = 999; // we assume a sane browser    
	if (navigator.appVersion.indexOf("MSIE") != -1)      // bah, IE again, lets downgrade version number      
	version = parseFloat(navigator.appVersion.split("MSIE")[1]);   
	return version;  }}
	if (Browser.Version() >= 8) {  
		document.write("<link rel='stylesheet' type='text/css' href='stylesheet_alt.css' />")
		}// if client is using IE7 or a sane browser, run this code}