Select from dropdown using outside click link

[WebDesignWorx]

Hello,
I like this script very much but there is something I can't make work.

For a simple Element within a Form I have a outside link with which I can select the option item by the use of a click. Is there a simple way I could make it work? Thanks in advance.

[WebDesignWorx]

This is the Code/Function I am using on the simple select.
However, when I convert the select box to Selectator, it doesn't work anymore.

function add_child_page(page_id) {
    //find and select the page in the parent dropdown
    var selectBox = document.add_page.parent; // form name and select-box id
    for (var i = 0; i < selectBox.options.length; i++) {
        if (selectBox.options[i].value == page_id) {
            selectBox.selectedIndex = i;
            break;
        }
    }
    document.add_page.menu_title.focus(); //set focus to add_page form
}

[jogvana]

Thanks for your feedback! We'll look into this asap.

[WebDesignWorx]

Thank you!

This code is what I am trying right now, but it doesn't work.
I will work on it too, schould I find a solution before you come back to me I will share here.

<li rel="1"><a href="#" class="add_child">[add child]</a></li>    
<li rel="2"><a href="#" class="add_child">[add child]</a></li>  
<li rel="3"><a href="#" class="add_child">[add child]</a></li>

    $("a.add_child").click(function(e){
        e.preventDefault();  
        var iID = $(this).closest('li').attr('rel');
        var sTarget = '#selectator_parent .selectator_option .selectator_value_' + iID;
        $(sTarget).trigger( "click" );
    });

The LI element is adding the class active (in FireBug) but unfortunately the select-box doesn't show the change.

[WebDesignWorx]

Any chance we can make it work?
I tried for quite some time, but jQuery and JS is something I can't master all too much.
Thanks for any hints.