create a pagination logic in javascript code example

Example: javascript pagination demo

var current_page = 1;
var records_per_page = 2;

var objJson = [
    { adName: "AdName 1"},
    { adName: "AdName 2"},
    { adName: "AdName 3"},
    { adName: "AdName 4"},
    { adName: "AdName 5"},
    { adName: "AdName 6"},
    { adName: "AdName 7"},
    { adName: "AdName 8"},
    { adName: "AdName 9"},
    { adName: "AdName 10"}
]; // Can be obtained from another source, such as your objJson variable

function prevPage()
{
    if (current_page > 1) {
        current_page--;
        changePage(current_page);
    }
}

function nextPage()
{
    if (current_page < numPages()) {
        current_page++;
        changePage(current_page);
    }
}

function changePage(page)
{
    var btn_next = document.getElementById("btn_next");
    var btn_prev = document.getElementById("btn_prev");
    var listing_table = document.getElementById("listingTable");
    var page_span = document.getElementById("page");

    // Validate page
    if (page < 1) page = 1;
    if (page > numPages()) page = numPages();

    listing_table.innerHTML = "";

    for (var i = (page-1) * records_per_page; i < (page * records_per_page); i++) {
        listing_table.innerHTML += objJson[i].adName + "
"; } page_span.innerHTML = page; if (page == 1) { btn_prev.style.visibility = "hidden"; } else { btn_prev.style.visibility = "visible"; } if (page == numPages()) { btn_next.style.visibility = "hidden"; } else { btn_next.style.visibility = "visible"; } } function numPages() { return Math.ceil(objJson.length / records_per_page); } window.onload = function() { changePage(1); };

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