function asc_currency_selector_on_change(url)
 {
     sel = document.getElementById('currency_selector');
     currency_id = sel.options[sel.selectedIndex].value;
     url = url.replace('%currency_id_value%', currency_id);
     window.location = url;
 }

function asc_go(url)
{
    if (url == '') return false;
    location.href=url;
    return true;
}