if(navigator.userAgent.indexOf('Safari')!=-1)
	document.write('<link href="css/safari.css" type="text/css" rel="stylesheet" media="screen" />');
	
if(navigator.userAgent.indexOf('Chrome')!=-1)
	document.write('<link href="css/chrome.css" type="text/css" rel="stylesheet" media="screen" />');
	
if(navigator.userAgent.indexOf('Opera')!=-1)
	document.write('<link href="css/opera.css" type="text/css" rel="stylesheet" media="screen" />');