function changeCity (value, prefix, retpath) {
	if (value == 0) return true;
	else {
		var reg=/m(\d+)r(\d*)/;
		var arr=reg.exec(value);
		if(arr) {
		m = arr[1];
		r = arr[2] == '' ? m : arr[2];
		location.href = prefix + '?writemodule=City&menu=' + m + '&redirect=' + r + '&retpath=' + retpath;
		}
		return true;
	}
}