var agt=navigator.userAgent.toLowerCase();
var is_mac=(agt.indexOf("mac")!=-1);
if (is_mac) { 
	document.write("<link rel='stylesheet' type='text/css' href='/code/rp_mac.css'>")
}else{       
	document.write("<link rel='stylesheet' type='text/css' href='/code/rp.css'>")
}