ASP.NET - tabs - Poner un botón de siguiente y que darle clic el me cambie a la pestaña numero 2

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>

<script src="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.8.9/jquery-ui.js" type="text/javascript"></script>

<link href="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.8.9/themes/start/jquery-ui.css"

    rel="stylesheet" type="text/css" />

<script type="text/javascript">

    var selected_tab = 1;

    $(function () {

        var tabs = $("#tabs").tabs({

            select: function (e, i) {

                selected_tab = i.index;

            }

        });

        selected_tab = $("[id$=selected_tab]").val() != "" ? parseInt($("[id$=selected_tab]").val()) : 0;

        tabs.tabs('select', selected_tab);

        $("form").submit(function () {

            $("[id$=selected_tab]").val(selected_tab);

        });

    });

</script>

<div id="tabs">

    <ul>

        <li><a href="#tabs-1">Tab 1</a></li>

        <li><a href="#tabs-2">Tab 2</a></li>

        <li><a href="#tabs-3">Tab 3</a></li>

    </ul>

    <div id="tabs-1">

        Content 1

    </div>

    <div id="tabs-2">

        Content 2

    </div>

    <div id="tabs-3">

        Content 3

    </div>

</div>

<asp:HiddenField ID="selected_tab" runat="server" />

<asp:Button ID="Button1" runat="server" Text="Do PostBack" />

protected void Page_Load(object sender, EventArgs e)

{

    selected_tab.Value = Request.Form[selected_tab.UniqueID];

}