function validateEmail(sEmailAddress)
{
	msg = "";
	sEmailAddress = sEmailAddress.toLowerCase();
	dotIndex = sEmailAddress.indexOf('.',1);
	atIndex = sEmailAddress.indexOf('@',1);
	if (atIndex < 0)
		msg = msg + "Your email address must contain an '@'\r\n";
	if (dotIndex < 0)
		msg = msg + "Your email address must contain a '.'\r\n";
	
	sValidChars = "abcdefghijklmnopqrstuvwxyz01234567890_-@.";
	
	bValidChar = true;
	for(nCharPos=1;nCharPos<sEmailAddress.length;nCharPos++)
	{
		sChar = sEmailAddress.slice(nCharPos,nCharPos+1);
		if (sValidChars.indexOf(sChar,0) < 0)
			bValidChar = false;
	}
	if (!bValidChar) 
		msg = msg + "Your email address contains invalid characters\r\n";
	
	return msg;

}