jquery tabs - activeTab switching back to default

We are using JQuery tabs to show a series of web parts (lists) on a Web Part Page.

Using these instructions on this page:

http://www.sharepointhillbilly.com/Lists/Posts/Post.aspx?ID=42

Every time we click on next page on any of the tabs (where there are more pages to show),  the tab flicks back to the default tab (the first tab in the list).

(we have tried to insert some code - as per shown on the above page to set a cookie to remember the active) but we don't fully understand it.

this is our code :

<!-- Reference the jQueryUI theme's stylesheet on the Google CDN. Here we're using the "Start" theme --> <link  type="text/css" rel="stylesheet" href="http://sypa-sharepoint/local/SiteAssets/jquery-ui.css" /> <!-- Reference jQuery on the Google CDN --> <script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script><!-- Reference jQueryUI on the Google CDN --> <script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jqueryui/1.10.0/jquery-ui.min.js"></script> <script type="text/javascript">
     jQuery(document).ready(function($) {
        $(".s4-wpcell").hide();
         $(".s4-wpcell-plain").hide();
         //Put the Web Part Title for all the Web Parts you wish
         //to put into the tabbed view into the array below.
        	HillbillyTabs(["Tab1","Tab2","Tab3","Tab4","Tab5"]);
        //show persisted tab        
        ShowActiveTab();

    });

    function HillbillyTabs(webPartTitles)
    {
        for(index in webPartTitles)
        {
            var title = webPartTitles[index];
            $("#HillbillyTabs").append('<li><a href="#Tab'+index+'" id="TabHead'+index+'" onclick="SetActiveTab(this.id);">'+
title+'</a></li>').after('<div id="Tab'+index+'"></div>');
            $("span:contains('"+title+"')").each(function(){
                if ($(this).text() == title){
                   var webPart = $(this).hide().closest("span").closest("[id^='MSOZoneCell_WebPart']");
                   if ($(webPart).contents().html() != undefined)
                   {
                           webPart = $(webPart).contents();
                   }
                   $("#Tab" + index).append((webPart));
            }});
        }
        $("#tabsContainer").tabs();
        $(".s4-wpcell").show();
         $(".s4-wpcell-plain").show();

    }



    function SetCookie(id)
    {
           var date = new Date();
           //make the cookie expire in 5 minutes
           date.setTime(date.getTime()+(300*1000));
           var expires = "; expires="+date.toGMTString();
           document.cookie = "ActiveTab="+id+expires+"; path=/";
    }
    function ShowActiveTab()
    {
        var name = "ActiveTab";
        var cookieArray = document.cookie.split(";");
        for (index in cookieArray)
        {
            var keyValuePair = cookieArray[index].split("=");
            var key = keyValuePair[0];
            key  = key.replace(/^\s+|\s+$/g, "");
            if (key == name)
            {
                var value = keyValuePair[1];
                $("#" + value).click();
                return;
            }
        }
    }</script><div id="tabsContainer"><ul id="HillbillyTabs"></ul></div>

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