function isEmpty(str)
{//this function checks if the string is empty
	for (var intloop = 0; intloop < str.length; intloop++)
		if (str.charAt(intloop) !=  " ")
			return false;
		return true ;
}
//***********************************************************************************************
function checkMail(str)
{//check if email address is valid
	var reg1 = /(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/ ; // not valid
	var reg2 = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?)$/; //valid
	if (!reg1.test(str) && reg2.test(str))
		return true ;
	return false ;
}
//*************************************************************************************************
function sendForm()
{
	if (isEmpty(document.getElementById("email").value))
	{
		alert("Please enter your email address.");
		document.getElementById("email").focus() ;
		return false ;
	}
	else
		if (!checkMail(document.getElementById("email").value))
		{
			alert("You've entered illigal email address.");
			document.getElementById("email").focus() ;
			return false ;	
		}
	document.getElementById("reqForm").submit() ;	
}
//******************************************************************************************
function add_to_favorites()
{
  var fav_url = document.URL;
  var fav_title = "TrackBull Web Site";
  if (document.all) 
  	window.external.AddFavorite(fav_url, fav_title) ;
}