function getInternetExplorerVersion()
// Returns the version of Internet Explorer or a -1
// (indicating the use of another browser).
{
  var rv = -1; // Return value assumes failure.
	if (navigator.appName == 'Microsoft Internet Explorer')
	{
		var ua = navigator.userAgent;
		var re  = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
		if (re.exec(ua) != null)
			rv = parseFloat( RegExp.$1 );
	}
	return rv;
}

function detectBrowser()
{
	var msg = " ";
	var ver = getInternetExplorerVersion();

	if ( ver <= 6.0 && ver != -1) 
	{
      alert("Thank you for your interest in the RBL Group!  Unfortunately we currently do not support your version of Internet Explorer.  Feel free to continue using this browser on our site, but some items may display incorrectly.  For a better viewing experience, please view rbl.net using Internet Explorer 7 or 8, Firefox 3, Safari 3 or 4, or Google Chrome.");
	}
}