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I need to display complex data like in your example.  once the user selects the items needed i need to collect what is selected. 

I've added a form and submit button put nothing posts to my action page.

The tree hasn't native support for FORM submit, so you need to add some code manually.

For example:

<script>
            my_tree= new...

            ... //tree init

function collectData(){
            var a=document.forms["a_form"];
            a.a_selected.value=my_tree.getSelectedItemId();
            a.a_checked.value=my_tree.getAllChecked();
}
</script>

<form onsubmit="collectData(); return true;" name="a_form">
            <input type="hidden" name="a_selected">
            <input type="hidden" name="a_checked">
            <input type="submit">

</form>

Not much can be said in addition to the reply above, but you also can check data grid controls and ajax calendar php and find out what we have probably missed in our explanation.