Write sample code for pagination using java script.

RAJEEVRM
Profile Answers by RAJEEVRM

Sep 12th, 2008

//Javscript code pagination.js file
===========

function Pager(tableName, itemsPerPage) {
    this.tableName = tableName;
    this.itemsPerPage = itemsPerPage;
    this.currentPage = 1;
    this.pages = 0;
    this.inited = false;

    this.showRecords = function(from, to) {
        var rows = document.getElementById(tableName).rows;
        // i starts from 1 to skip table header row
        for (var i = 1; i < rows.length; i++) {
            if (i < from || i > to)
                rows[i].style.display = 'none';
            else
                rows[i].style.display = '';
        }
    }

    this.showPage = function(pageNumber) {
    if (! this.inited) {
      alert("not inited");
      return;
    }
        var oldPageAnchor = document.getElementById('pg'+this.currentPage);
        oldPageAnchor.className = 'pg-normal';

        this.currentPage = pageNumber;
        var newPageAnchor = document.getElementById('pg'+this.currentPage);
        newPageAnchor.className = 'pg-selected';

        var from = (pageNumber - 1) * itemsPerPage + 1;
        var to = from + itemsPerPage - 1;
        this.showRecords(from, to);
    }

    this.prev = function() {
        if (this.currentPage > 1)
            this.showPage(this.currentPage - 1);
    }

    this.next = function() {
        if (this.currentPage < this.pages) {
            this.showPage(this.currentPage + 1);
        }
    }

    this.init = function() {
        var rows = document.getElementById(tableName).rows;
        var records = (rows.length - 1);
        this.pages = Math.ceil(records / itemsPerPage);
        this.inited = true;
    }
    this.showPageNav = function(pagerName, positionId) {
    if (! this.inited) {
      alert("not inited");
      return;
    }
    var element = document.getElementById(positionId);

    var pagerHtml = '<span onclick="' + pagerName + '.prev();" class="pg-normal"> &#171 Prev </span> | ';
        for (var page = 1; page <= this.pages; page++)
            pagerHtml += '<span id="pg' + page + '" class="pg-normal" onclick="' + pagerName + '.showPage(' + page + ');">' + page + '</span> | ';
        pagerHtml += '<span onclick="'+pagerName+'.next();" class="pg-normal"> Next »</span>';

        element.innerHTML = pagerHtml;
    }
}
======================
HTML file
<html version="-//W3C//DTD HTML 4.01 Transitional//EN">
    <head>
        <style type="text/css">
            .pg-normal {
                color: black;
                font-weight: normal;
                text-decoration: none;
                cursor: pointer;
            }
            .pg-selected {
                color: black;
                font-weight: bold;
                text-decoration: underline;
                cursor: pointer;
            }
        </style>

        <script type="text/javascript" src="pagination.js"></script>
    </head>

    <body>
        <form action="" method="get" enctype="application/x-www-form-urlencoded">
        <table id="results">
            <tr>
                <th>#</th>
                <th>field</th>
            </tr>
            <tr>
                <td>1</td>
                <td>rajeev</td>
            </tr>
            <tr>
                <td>2</td>
                <td>ramesh</td>
            </tr>
            <tr>
                <td>3</td>
                <td>Rahul</td>
            </tr>
            <tr>
                <td>4</td>
                <td>Bala</td>
            </tr>
            <tr>
                <td>5</td>
                <td>Teamjhon</td>
            </tr>
            <tr>
                <td>6</td>
                <td>Robin</td>
            </tr>
            <tr>
                <td>7</td>
                <td>Sambha</td>
            </tr>
            <tr>
                <td>8</td>
                <td>Arjun</td>
            </tr>
            <tr>
                <td>9</td>
                <td>Satyan</td>
            </tr>
            <tr>
                <td>10</td>
                <td>Singapore</td>
            </tr>
        </table>
        <div id="pageNavPosition"></div>
        <div><input type="submit" onclick="alert('Hey, this is just a sample!'); return false;" /> <input type="reset" /></div>
    </form>

    <script type="text/javascript"></script>

    </body>
</html>

=======

Enjoy :)