[Solved] Creating Windows client side

[RES]

I'm using a Telerik TreeView and when I select a node I want to be able to add a child to it from a form on a Telerik Window control.  When an item on the tree is selected I'm using some JavaScript to store the selected value of the node in a hidden input.

My TreeView control:

@(Html.Telerik().TreeView()
        .Name("TreeView")
        .ClientEvents(events => events
            .OnSelect("onSelect"))
        .BindTo(Model.ItemCollection, mappings =>
        {
            mappings.For<TreeViewItemViewModel>(binding => binding
                    .ItemDataBound((item, templateItem) =>
                    {
                        item.Text = templateItem.Description;
                        item.Value = templateItem.Id.ToString();
                        item.Expanded = true;
                    })
                    .Children(category => category.ItemCollection));
        })
)

My JavaScript function:

function onSelect(e) {
    var selectedValueHidden = document.getElementById("selectedvalue");
    var selectedValue = getTreeView().getItemValue(e.item);
    selectedValueHidden.value = selectedValue;
}

How can I get the value of the hidden input and use it as a parameter for a Window control?

[RES]

Nevermind, I'll just use the jQuery UI dialog to do what I need, much easier.