Accordian headers all collapsed initially on page load

Accordion1.SelectedIndex = -1;

Accordion1.RequireOpenedPane = false;

Expand All / Collapse All panes in Ajax Accordion Extender

There is no direct way to Expand/Collapse all panes in Accordion Extender. Using following java script, Accordion can be Expand/Collapse all panes in one click.

<script type="text/javascript">

    function pageLoad()

    {

    collapseAll();

    }

    function collapseAll()

    {

        var behavior = $get("<%=UserAccordion.ClientID%>").AccordionBehavior;

            for (var i = 0; i < behavior._panes.length; i++) {

                behavior.get_Pane(i).content.style.display = 'none';

                behavior.get_Pane(i).content.height = 0;

                behavior.get_Pane(i).content.style.height = '0px';

            }           

            behavior.set_SelectedIndex(-1);

    }

    function expandall()

    {

       var behavior = $get("<%=UserAccordion.ClientID%>").AccordionBehavior;

            for (var i = 0; i < behavior._panes.length; i++) {

                behavior.get_Pane(i).content.style.display = 'block';

                behavior.get_Pane(i).content.height = behavior.get_Pane(i).content.scrollHeight;

                behavior.get_Pane(i).content.style.height = behavior.get_Pane(i).content.scrollHeight + 'px';

            }

    }

    </script>