function isNumber(field) {
	var re = /^[0-9-'.'-',']*$/;
	if (!re.test(field.value)) {
		//alert('Value must be all numberic charcters, including "." or "," non numerics will be removed from field!');
		field.value = field.value.replace(/[^0-9-'.'-',']/g,"");
	}
}