Scroll To View

I have a treeview inside a tab in a modalpopupextender, I have a routine which selects and expands a node based on the user search, the issue I have is it will not scroll in to view.

i have tried numerous ways but to no avail, last effort was this, after the search happens I call this function 

    private void SetJavaScriptSearch()
        {
            //string stv = @"var elem = document.getElementById('{0}_SelectedNode');
            //            if(elem != null )
            //            {
            //                var node = document.getElementById(elem.value);
            //                if(node != null)
            //                {
            //                        node.scrollIntoView(true);
            //                }
            //            }";

            string stv = @"var elem = document.getElementById('sitecontent_tabs_tpDetails_tvGenerict38');
                        if(elem != null )
                        {
                            var node = document.getElementById(elem.value);
                            if(node != null)
                            {
                                    node.scrollIntoView(true);
                            }
                        }";

            //ScriptManager.RegisterStartupScript(this, GetType(), "myscript", stv.Replace("{0}", tvGeneric.ClientID), true);

            ScriptManager.RegisterStartupScript(this, GetType(), "myscript", stv, true);

        }

Here is the page

<a class="selectedNode treeNode treeNode" id="sitecontent_tabs_tpDetails_tvGenerict38" style="text-decoration: none;" href="javascript:__doPostBack('ctl00$sitecontent$tabs$tpDetails$tvGeneric','s80')">Test Category</a>