var Mac = navigator.appVersion.indexOf('Mac',0) != -1;
var Win = navigator.appVersion.indexOf('Win',0) != -1;
var IE  = getBrouwserName() == 'Explorer';
var NN  = getBrouwserName() == 'Netscape';
var Moz = navigator.userAgent.indexOf("Gecko") != -1;
var VER = parseInt(navigator.appVersion);
var Vmajor = parseInt(navigator.appVersion);	// ex. 3
var Vminor = parseFloat(navigator.appVersion);	// ex. 3.01
var MacIE5 = ((Mac && navigator.appVersion.indexOf('MSIE 5',0) != -1) || (Mac && IE && VER > 4));
var MacIE4 = ((Mac && navigator.appVersion.indexOf('MSIE 4.',0) != -1));
var MacIE3 = ((Mac && navigator.appVersion.indexOf('MSIE 3.',0) != -1));
var MIE4 = (Mac && IE && VER == 4);
var WinIE = (Win && IE);

var NN40 = (NN && navigator.appVersion.indexOf('4.0',0) != -1);

function getBrouwserName() {
var ap = navigator.appName;
var ua = navigator.userAgent;
if (ap.indexOf("Microsoft Internet Explorer",0) != -1) return "Explorer";
if (ap.indexOf("Netscape",0) != -1) return "Netscape";
return "";
}