var uaVer = navigator.userAgent;

var isIE = (uaVer.indexOf("MSIE")!=-1);
var isMoz = (uaVer.indexOf("Gecko")!=-1);
var isOp = (uaVer.indexOf("Opera")!=-1);
var isNN4 = (!(isIE) && !(isMoz) && !(isOp) &&
		navigator.appName.charAt(0) == "N" &&
		navigator.appVersion.charAt(0) == "4");

var isWin = (uaVer.indexOf("Windows")!=-1);
var isMac = (uaVer.indexOf("Mac")!=-1);

if (isMoz || isOp) {
	document.writeln ("<LINK rel=\"stylesheet\" type=\"text/css\" href=\"/~mori/Style/gecko.css\">");
} else if (isNN4) {
	document.writeln ("<LINK rel=\"stylesheet\" type=\"text/css\" href=\"/~mori/Style/nn4.css\">");
} else {
	document.writeln ("<LINK rel=\"stylesheet\" type=\"text/css\" href=\"/~mori/Style/default.css\">");
}