function check_browser()
{
	if ( navigator.appName == "Microsoft Internet Explorer" ) 
	{
		if(navigator.appVersion.indexOf("MSIE 8.0", 0) == -1)
		{
			alert("Your browser is extremely outdated. Please upgrade your browser!" + navigator.appVersion);
			window.open("http://www.microsoft.com/windows/internet-explorer", "", "width:600px; height: 450px;");
		}
	}
}