var uagent = navigator.userAgent.toLowerCase();
var isWin = uagent.search("windows") > -1;
if (/Chrome[\/\s](\d+\.\d+)/.test(navigator.userAgent) && isWin){ //test for Chrome/x.x or Chrome x.x (ignoring remaining digits);
	var gcversion=new Number(RegExp.$1) // capture x.x portion and store as a number
	if (gcversion>=5)
		document.write('<link rel="stylesheet" href="/css/browser/gc5.win.css" type="text/css" />');
}