var browser_type = navigator.userAgent.toLowerCase();
var os_type = navigator.appVersion.toLowerCase();

if ((browser_type.indexOf("safari") != -1) && (os_type.indexOf("windows") != -1)) {
	document.write('<link rel="stylesheet" type="text/css" href="http://www.ymca.nl/css/style_pc_webkit.css" />');
}

if ((browser_type.indexOf("safari") != -1) && (os_type.indexOf("mac") != -1)) {
	document.write('<link rel="stylesheet" type="text/css" href="http://www.ymca.nl/css/style_apple.css" />');
}