g_isDynamic = !window.navigator.appVersion.indexOf('4.') || !window.navigator.appVersion.indexOf('5.');
var agent = navigator.userAgent.toLowerCase(); 
if( agent.indexOf('mac') > 0)
	g_isMac = true;
if( agent.indexOf('inux') > 0)
	g_isLinux = true
g_sBr = window.navigator.appName;
if (g_sBr == "Microsoft Internet Explorer")
	g_isIE = true;	
else if (g_sBr =="Netscape")
	g_isNS = true;