bAgent = window.navigator.userAgent;
bAppName = window.navigator.appName;
bMozIdx = bAgent.indexOf("Mozilla/");
if ((bAppName.indexOf("Netscape") >= 0) && (bAgent.indexOf("Mozilla/4") >= 0) && (bAgent.indexOf("Mac") >= 0))
document.writeln("<link rel=\"stylesheet\" href=http://www.webex.com/zss_nn4mac.css>");
else if ((bAppName.indexOf("Netscape") >= 0) && (bAgent.indexOf("Mozilla/4") >= 0) && (bAgent.indexOf("Win") >= 0))
document.writeln("<link rel=\"stylesheet\" href=http://www.webex.com/zss_nn4win.css>");
else document.writeln("<link rel=\"stylesheet\" href=http://www.webex.com/zss_ie.css>");