if ( navigator.userAgent.indexOf("Mac") !=-1 ){
			document.write("<LINK REL='stylesheet' HREF='css/mac.css'>");
			}
		else if ( navigator.userAgent.indexOf("MSIE") !=-1 ){
			document.write("<LINK REL='stylesheet' HREF='css/win.css'>");
			}
		else {
			document.write("<LINK REL='stylesheet' HREF='css/winnn.css'>");
			}