var name = navigator.appName.toLowerCase();
var ver = navigator.appVersion.toLowerCase();
if (name == "microsoft internet explorer" && ver >="3") {
	document.write('<LINK REL="stylesheet" HREF="css/ie.css" TYPE="text/css">');
} else if (name == "netscape" && ver >="3") {
	document.write('<LINK REL="stylesheet" HREF="css/ns.css" TYPE="text/css">');
} else {
	document.write('<LINK REL="stylesheet" HREF="css/ie.css" TYPE="text/css">');
}