function TabNext(obj,event,len,elem) {
	if (event == "down") {
		phone_field_length = obj.value.length;
	} else if (event == "up") {
		if (obj.value.length != phone_field_length) {
			phone_field_length = obj.value.length;
			if (phone_field_length == len) {			
				elem.focus();
			}
		}
	}
}