//===================
// Check the browser.
//===================
//var msWin = false;
var IsOpera = false;
var IsSafari = false;
var IsIE = false;
var IsNN = false;
var BrowserVer = 0;

var verPos;
var ua = navigator.userAgent;
//alert("userAgent=" + ua);

// Get operating system
//var platform = navigator.platform;
//if (platform.indexOf("Win32") != -1) {
//   msWin = true;
//}

//Opera
if (ua.indexOf("Opera") != -1) {
   IsOpera = true;
   verPos = ua.indexOf("Opera") + 6;
   BrowserVer = parseFloat(ua.substr(verPos));

//Safari
} else if (navigator.vendor == "KDE") {
   IsSafari = true;

//Mozilla, FireFox, etc.
} else if (navigator.product == "Gecko") {
   IsNN = true;
   BrowserVer = parseFloat(navigator.appVersion); //Mozilla version

//Internet Explorer
} else if (ua.indexOf("MSIE") != -1) {
   IsIE = true;
   verPos = ua.indexOf("MSIE") + 5;
   BrowserVer = parseFloat(ua.substr(verPos));
}
// Check browser
//alert("IsIE=" + IsIE + "  IsNN=" + IsNN + "  IsOpera=" + IsOpera + "  BrowserVer=" + BrowserVer);
if ((IsIE && (BrowserVer < 6)) || 
    (IsNN && (BrowserVer < 5)) || 
    (IsOpera && (BrowserVer < 8)) ) {
   //alert ("This website works best with Internet Explorer 6.0, Firefox 1.0, Opera 8.0, or higher.");
   //document.location="unsupported.aspx"
}