function isNumeric(value, validrange)
{
	var vChars = validrange;
	var isNumber = true;
	var char;
	for(i=0; i < value.length && isNumber == true; i++)
	{
		char = value.charAt(i);
		if(vChars.indexOf(char)==-1)
			isNumber = false;
	}
	return isNumber;
}