function CalculatePrice(){  
    new Ajax.Request('/price',
    {
        method: 'post', 
        parameters: $('renting').serialize(true),
        onSuccess: function(transport){
            var response = transport.responseText || "error";
            $('price-field').innerHTML = response;      
        },
        onFailure: function(){ alert('Something went wrong...') }
    });
    
    if ($('place-2').checked){
        $('distance').show();
    } else {
        $('distance').hide();
    } 
    
    return false;     
}