ref_usa = {
    set_page: function() {
        if (document.getElementById('ref-usa-control') != null)
            document.getElementById('ref-usa-control').style.display = 'block';
    },
    show_control: function() {
        window.scrollTo(0, 0);
        document.getElementById('state-picker-control').style.display = 'block';
    },
    close_control: function() {
        document.getElementById('state-picker-control').style.display = 'none';
    },
    set_state: function() {
        window.location = '/ref_usa/set_state.aspx?c=' + arguments[0];
    }
};