if (is_mac) {
	//alert('a mac!');
	if (is_nav4) {
		//alert('nn4 on mac');
		document.write("<link href='assets/css/discover/styles_NN4Mac.css' rel='stylesheet' type='text/css'/>");
	}
	else if (is_safari) {
		//alert('safari on mac');
			document.write("<link href='assets/css/discover/styles_Safari.css' rel='stylesheet' type='text/css'/>");
	}
	else if (is_firefox) {
		//alert('firefox on mac');
			document.write("<link href='assets/css/discover/styles_FirefoxMac.css' rel='stylesheet' type='text/css'/>");
	}
	else if (is_nav6up) {
		//alert('nn6+ on mac');
			document.write("<link href='assets/css/discover/styles_NN6UpMac.css' rel='stylesheet' type='text/css'/>");
	}
		else {
		//alert('ie on mac');
		document.write("<link href='assets/css/discover/styles_IEMac.css' rel='stylesheet' type='text/css'/>");
	}
} else  {
	if (is_nav4) {
	//alert('ie on pc');
	document.write("<link href='assets/css/discover/styles_NN4.css' rel='stylesheet' type='text/css'/>");
	}
	else if (is_firefox) {
		//alert('firefox on pc');
			document.write("<link href='assets/css/discover/styles_Firefox.css' rel='stylesheet' type='text/css'/>");
	}
	else if (is_nav6up) {
			//alert('nn6 on pc');
			document.write("<link href='assets/css/discover/styles_NN6Up.css' rel='stylesheet' type='text/css'/>");
	}
		else if (is_ie) {
				//alert('ie on pc');
				if (is_ie6) { 
				//alert('IE6')
				document.write("<link href='assets/css/discover/styles_ie6.css' rel='stylesheet' type='text/css'/>");
				} else {
				//alert('NOT IE6')
				document.write("<link href='assets/css/discover/styles.css' rel='stylesheet' type='text/css'/>");
				}
				
		}
			else {
					//alert('other');
					document.write("<link href='assets/css/discover/styles.css' rel='stylesheet' type='text/css'/>");
		}			
}