var ns = (document.layers) ? 1 : 0;
var ie = (document.getElementById) ? 1 : 0;
//var isIE,isIE5,isIE5_0,isIE7,isGecko,isSafari,isOpera,isMac,isNS7,isNS71;
var ua = navigator.userAgent; //alert(ua);
var IEVersion = navigator.appVersion.split("MSIE");
	IEVersion = parseFloat(IEVersion[1]);
var isIE = (navigator.appName == "Microsoft Internet Explorer");
var isIE5 = isIE && (ua.indexOf('MSIE 5') != -1);
var isIE5_0 = isIE && (ua.indexOf('MSIE 5.0') != -1);
var isIE6 = isIE && (ua.indexOf('MSIE 6') != -1);
var isIE7 = isIE && (ua.indexOf('MSIE 7') != -1);
var isGecko = ua.indexOf('Gecko') != -1;
var isSafari = ua.indexOf('Safari') != -1;
var isKonqueror = (ua.indexOf("konqueror") != -1);
var isOpera = ua.indexOf('Opera') != -1;
var isOpera8= false;
var isOpera9= false;
if (isOpera){
	var arVersion = navigator.appVersion.split("Opera");
	if (parseFloat(arVersion) >= 9){
		isOpera9= true;
	}else{
		isOpera8= true;
	}
}
var isMac = ua.indexOf('Mac') != -1;
var isNS7 = ua.indexOf('Netscape/7') != -1;
var isNS71 = ua.indexOf('Netscape/7.1') != -1;