function browserCheck()
{
   var ua = window.navigator.userAgent;
   var error = false;
   var errorMessage = "Please download a newer version of your browser!";
   var version = 0;
   if (ua.indexOf("MSIE") > 0)
   {
       version = parseInt(ua.substr(ua.indexOf("MSIE")+5,3));
       if (version < 8)
           error = true;
   }
   else if (ua.indexOf("Safari") >0)
   {
       version = parseInt(ua.substr(ua.indexOf("Version/")+8,3));
       if (version < 4)
           error = true;
   }
   else if (ua.indexOf("Firefox") > 0)
   {
       version = parseFloat(ua.substr(ua.indexOf("Firefox/")+8,5));
       if (version < 3.5)
           error = true;
   }
   if (error)
   {
       errorMessage = errorMessage + "Try one of the links below for a better experience:<br/>";
       errorMessage = errorMessage + "http://www.mozilla.com/en-US/firefox/personal.html";
       errorMessage = errorMessage + "http://www.apple.com/safari/download/'";
       errorMessage = errorMessage + "http://www.microsoft.com/";
       errorMessage = errorMessage + "http://www.update.microsoft.com/microsoftupdate/v6/default.aspx?ln=en-us";
       errorMessage = errorMessage + "http://windows.microsoft.com/en-US/windows/products/internet-explorer";
	   alert (errorMessage);
       return false;
   }
   else
   {
       return true;
   }
}