function getWhichbrowser() {

	
//operating system and browser detection	
	
var Browser = navigator.appName;	
if (Browser  == "Netscape")	
	{	
	document.write('<link rel="stylesheet" type="text/css" href="css/pcns.css">');	
	}		
	else	
	{	
	document.write('<link rel="stylesheet" type="text/css" href="css/pcie.css">');	
	}
}