var errorDisplayed = false;
	
	function validate(result, message, object)
	{
		if (!result)
		{
			if (!errorDisplayed)
			{
				alert(message)
				object.focus();
				errorDisplayed = true;
			}
		}
	}
	
	function allOK()
	{
		var temp = errorDisplayed;
		errorDisplayed = false;
		return !temp;
	}
	
	function isEmail(testEmail)
	{
		var regex = /^[a-zA-Z0-9._-]+@([a-zA-Z0-9.-]+\.)+[a-zA-Z0-9.-]{2,4}$/;
		return regex.test(testEmail);
	}