function CheckOS()	{
var WinStyle = '<link rel="stylesheet" type="text/css" href="res/includes/winstyle.css">'
var MacStyle = '<link rel="stylesheet" type="text/css" href="res/includes/macstyle.css">'

if (navigator.appVersion.indexOf("Mac") != -1) {
	document.write(MacStyle);
} else {
    document.write(WinStyle);
	}
}
	CheckOS()