var Win = navigator.appVersion.indexOf('Win',0) != -1;
	var Mac = navigator.appVersion.indexOf('Mac',0) != -1;
		if(Mac){
			document.writeln('<link rel="stylesheet" type="text/css" href="safari.css">');
		}
		else if(Win){
			document.writeln('<link rel="stylesheet" type="text/css" href="base.css">');
		}