function validate_email(field,alerttxt)
{
	with (field)
	{
		apos=value.indexOf("@")
		dotpos=value.lastIndexOf(".")
		if (apos<1||dotpos-apos<2) 
	        {
			alert(alerttxt);
			return false;
		}
		else
                {
			return true;
		}
	}
}
function ValidEmail(thisform)
{
	with (thisform)
	{
		if (validate_email(email,"Not a valid e-mail address!")==false)
  		{
			email.focus();
			return false;
		}
		else
			return true
	}
}