function setCheckboxValue()
{
    var elements = document.body.getElementsBySelector('[type="checkbox"]');
    elements.each(function(e){
        
        e.observe('click', function(event){
            var element = event.findElement('input');
            
            if (element.checked) {
                element.value = 1;
            }
            else {
                element.value = 0;
            }
        });
    }, this);
}

function selCountry_onChange(country_id) {
    var
        option        = null,
        states_id     = new Array(),
        states_title  = new Array(),
        i             = 0;
    
    for (i = 0; i < countries_id.length; i++) {
        if (countries_id[i] == country_id) {
            
            states_id    = countries_states_id[i];
            states_title = countries_states_title[i];
            break;
        }
    }
    
    $('address_state_id').innerHTML = '';
    option = new Element('option', { 'value': ''}).update('[select state]');
    $('address_state_id').insert(option);
    
    if (states_id.length > 0) {
        
        for (i = 0; i < states_id.length; i++) {
            option = new Element('option', { 'value': states_id[i]}).update(states_title[i]);
            $('address_state_id').insert(option);
        }
        
        $('address_state_id').up('li').show();
        $('address_state_title').up('li').hide();
        $('address_country_has_states').value = 1;
    }
    else {
        $('address_state_id').up('li').hide();
        $('address_state_title').up('li').show();
        $('address_country_has_states').value = 0;
    }
}