var form_field_length = 0;

function TabNext(obj, event, len, next_field) {

	if (event == "down") {
		// form_field_length = obj.value.length;

	} else if (event == "up") {
        s = new String(obj.value);
        obj.value = s.replace(/ /g, "");
		if (obj.value.length != form_field_length) {
			form_field_length = obj.value.length;
			if (form_field_length == len) {
				next_field.focus();
			}
		}
	}
}