window.addEvent('domready', function() {
    var selectCityForm = $('changeCity');
    if( selectCityForm ) {
    	$( 'city' ).addEvent( 'change', function() {
    		if( $( 'city' ).get( 'value' ) != 0 ) {
    			selectCityForm.submit();	
    		}    		
    	});
    }
});