var mobileDevices = ['iphone','Blazer', 'Palm', 'Handspring', 'Nokia', 'Kyocera', 'Samsung', 'Motorola', 'Smartphone', 'Windows CE', 'Blackberry', 'WAP', 'SonyEricsson', 'PlayStation Portable', 'LG', 'MMP', 'OPWV', 'Symbian', 'EPOC'];
			
			function isMobile(){
				var uagent = navigator.userAgent.toString();
				for(i in mobileDevices){
					var device = mobileDevices[i];
					var reg = new RegExp(device, 'gi');
					var matchFound = reg.test(uagent);
					if(matchFound){		
					var fileref=document.createElement("link")
					  fileref.setAttribute("rel", "stylesheet")
					  fileref.setAttribute("type", "text/css")
					  fileref.setAttribute("href", "media.css")
					 document.getElementsByTagName("head")[0].appendChild(fileref);			
					return true;
					}
				}
				  var ref=document.createElement("link")
				  ref.setAttribute("rel", "stylesheet")
				  ref.setAttribute("type", "text/css")
				  ref.setAttribute("href", "screen.css")
				 document.getElementsByTagName("head")[0].appendChild(ref);
				 return false;			
			}
			isMobile();