var aNam = navigator.appName;
var aVer = navigator.appVersion;
var uAge = navigator.userAgent;

var gCssFile = new Array();

if (aVer.charAt(0) >= 4) {
	gCssFile[gCssFile.length] = "base.css";
	if (uAge.indexOf('Win') != -1) {
		if (aNam.indexOf('Microsoft') != -1) {
			gCssFile[gCssFile.length] = "win_ie.css";
		}
		if (uAge.indexOf('Opera') != -1) {
			gCssFile[gCssFile.length] = "win_opera.css";
		}
		if (aNam.indexOf('Netscape') != -1) {
			gCssFile[gCssFile.length] = "win_nn.css";
		}
		if (uAge.indexOf('Gecko') != -1) {
			gCssFile[gCssFile.length] = "win_gecko.css";
		}
	} else if (uAge.indexOf("Mac") != -1) {
		if (aNam.indexOf('Microsoft') != -1) {
			gCssFile[gCssFile.length] = "mac_ie.css";
		}
		if (aNam.indexOf('Netscape') != -1) {
			gCssFile[gCssFile.length] = "mac_nn.css";
		}
		if (uAge.indexOf('Gecko') != -1) {
			gCssFile[gCssFile.length] = "mac_gecko.css";
		}
	}
}

for (i in gCssFile) {
	document.open();
	document.write('<LINK REL="stylesheet" TYPE="text/css" HREF="common/css/' + gCssFile[i] + '">');
	document.close();
}