var bType= navigator.appName
	
	if ((navigator.appVersion.indexOf("Macintosh") != -1) && 
		(navigator.appVersion.indexOf("5.0") == -1))  {
	    document.write("<LINK REL=stylesheet HREF=\"/css/main_mac.css\" TYPE=\"text/css\">"); 
		}
	else if ((navigator.appVersion.indexOf("Windows") != -1) && 
		(bType == "Netscape"))  {
	    document.write("<LINK REL=stylesheet HREF=\"/css/main_netpc.css\" TYPE=\"text/css\">"); 
		}
	else {
	    document.write("<LINK REL=stylesheet HREF=\"/css/main.css\" TYPE=\"text/css\">"); 
		}