function IsNumeric(sText)
{
	var ValidChars = "0123456789.";
	var IsNumber=true;
	var Char;

	for (i = 0; i < sText.length && IsNumber == true; i++) 
	{ 
		Char = sText.charAt(i); 
		if (ValidChars.indexOf(Char) == -1) 
		   IsNumber = false;
	}
	return IsNumber;
}

function IsInteger(sText)
{
	var ValidChars = "0123456789";
	var IsNumber=true;
	var Char;

	for (i = 0; i < sText.length && IsNumber == true; i++) 
	{ 
		Char = sText.charAt(i); 
		if (ValidChars.indexOf(Char) == -1) 
		   IsNumber = false;
	}
	return IsNumber;
}

function appendMessage(message, message_to_attach)
{
	if (message != "")
		message += "\n";
	message += message_to_attach;
	return message;
}