navigate between the pages dynamically using jquery and data file as some json object?

i want to navigate the next and previous pages with two more methods like

next() and previous()..

Here is the displayTab() method means current page

function displayTab(pageNo) {

    currentParaId = 0;
    previousParaId = 0;
    noOfQuestions[pageNo] = 0;
    originalState = $("#container").clone();    
    sliderInit();   
    jscrollpaneInit();
    screenIndex = pageNo;
    pageIndex = parseInt(screenIndex);

    init(screenIndex);
    showScreen();   

    var navPageValue = 'navpage' + (pageNo + 1) ;
    $('#navddpages').addClass(navPageValue);
    initDropdown();
    tab0_sidebarPosition();
    //var siderbarHt = sidebarHeight[currentPage];
    //$("#tab_0_sidebar").css("height",siderbarHt);

}