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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<link rel="shortcut icon" type="image/ico" href="http://www.datatables.net/favicon.ico">
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<meta name="viewport" content="initial-scale=1.0, maximum-scale=2.0">
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<title>DataTables example - Retain selection on reload</title>
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<link rel="stylesheet" type="text/css" href="../../../../media/css/jquery.dataTables.css">
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<link rel="stylesheet" type="text/css" href="../../css/select.dataTables.css">
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<link rel="stylesheet" type="text/css" href="../../../Buttons/css/buttons.dataTables.css">
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<link rel="stylesheet" type="text/css" href="../../../../examples/resources/syntax/shCore.css">
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<link rel="stylesheet" type="text/css" href="../../../../examples/resources/demo.css">
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<style type="text/css" class="init">
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</style>
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<script type="text/javascript" language="javascript" src="//code.jquery.com/jquery-1.11.3.min.js"></script>
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<script type="text/javascript" language="javascript" src="../../../../media/js/jquery.dataTables.js"></script>
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<script type="text/javascript" language="javascript" src="../../js/dataTables.select.js"></script>
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<script type="text/javascript" language="javascript" src="../../../Buttons/js/dataTables.buttons.js"></script>
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<script type="text/javascript" language="javascript" src="../../../../examples/resources/syntax/shCore.js"></script>
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<script type="text/javascript" language="javascript" src="../../../../examples/resources/demo.js"></script>
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<script type="text/javascript" language="javascript" class="init">
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$(document).ready(function() {
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var table = $('#example').DataTable( {
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ajax: '../../../../examples/ajax/data/objects.txt',
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deferRender: true,
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columns: [
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{ data: 'name' },
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{ data: 'position' },
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{ data: 'office' },
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{ data: 'extn' },
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{ data: 'start_date' },
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{ data: 'salary' }
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],
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rowId: 'extn',
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select: true,
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dom: 'Bfrtip',
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buttons: [
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{
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text: 'Reload table',
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action: function () {
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table.ajax.reload();
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}
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}
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]
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} );
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} );
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</script>
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</head>
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<body class="dt-example">
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<div class="container">
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<section>
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<h1>DataTables example <span>Retain selection on reload</span></h1>
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<div class="info">
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<p>DataTables has the ability to use a property in the data source for each row as that row's unique identifier through the <a href=
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"//datatables.net/reference/option/rowId"><code class="option" title="DataTables initialisation option">rowId</code></a> option. This is typically used in
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DataTables to assign an <code>id</code> attribute to the <code class="tag" title="HTML tag">tr</code> elements in the table, but it can also be used by Select and
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other libraries to retain a unique identifier for each row over data reloads.</p>
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<p>Select uses this information to be able to retain row selection over a data reload. Generally, if a table is reloaded, the state of each row is lost (since the
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old rows are deleted and new rows added), but this can be undesirable, particularly if performing frequent data updates. Setting the <a href=
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"//datatables.net/reference/option/rowId"><code class="option" title="DataTables initialisation option">rowId</code></a> option of DataTables will address
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this.</p>
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<p>This example uses the <code>extn</code> property of the row as the <a href="//datatables.net/reference/option/rowId"><code class="option" title=
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"DataTables initialisation option">rowId</code></a> option (normally a database primary key might be used). A reload button is also available through the <a href=
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"https://datatables.net/extensions/buttons">Buttons extension</a> which will call the <a href="//datatables.net/reference/api/ajax.reload()"><code class="api"
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title="DataTables API method">ajax.reload()</code></a> method when activated.</p>
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<p>To demonstrate Select's ability to retain the selected rows over a data reload, select a number of rows and then click the <em>Reload table</em> button.</p>
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</div>
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<table id="example" class="display" cellspacing="0" width="100%">
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<thead>
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<tr>
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<th>Name</th>
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<th>Position</th>
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<th>Office</th>
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<th>Extn.</th>
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<th>Start date</th>
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<th>Salary</th>
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</tr>
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</thead>
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<tfoot>
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<tr>
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<th>Name</th>
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<th>Position</th>
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<th>Office</th>
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<th>Extn.</th>
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<th>Start date</th>
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<th>Salary</th>
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</tr>
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</tfoot>
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</table>
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<ul class="tabs">
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<li class="active">Javascript</li>
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<li>HTML</li>
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<li>CSS</li>
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<li>Ajax</li>
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<li>Server-side script</li>
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</ul>
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<div class="tabs">
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<div class="js">
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<p>The Javascript shown below is used to initialise the table shown in this example:</p><code class="multiline language-js">$(document).ready(function() {
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var table = $('#example').DataTable( {
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ajax: '../../../../examples/ajax/data/objects.txt',
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deferRender: true,
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columns: [
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{ data: 'name' },
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{ data: 'position' },
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{ data: 'office' },
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{ data: 'extn' },
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{ data: 'start_date' },
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{ data: 'salary' }
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],
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rowId: 'extn',
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select: true,
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dom: 'Bfrtip',
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buttons: [
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{
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text: 'Reload table',
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action: function () {
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table.ajax.reload();
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}
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}
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]
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} );
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} );</code>
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<p>In addition to the above code, the following Javascript library files are loaded for use in this example:</p>
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<ul>
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<li><a href="//code.jquery.com/jquery-1.11.3.min.js">//code.jquery.com/jquery-1.11.3.min.js</a></li>
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<li><a href="../../../../media/js/jquery.dataTables.js">../../../../media/js/jquery.dataTables.js</a></li>
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<li><a href="../../js/dataTables.select.js">../../js/dataTables.select.js</a></li>
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<li><a href="../../../Buttons/js/dataTables.buttons.js">../../../Buttons/js/dataTables.buttons.js</a></li>
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</ul>
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</div>
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<div class="table">
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<p>The HTML shown below is the raw HTML table element, before it has been enhanced by DataTables:</p>
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</div>
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<div class="css">
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<div>
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<p>This example uses a little bit of additional CSS beyond what is loaded from the library files (below), in order to correctly display the table. The
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additional CSS used is shown below:</p><code class="multiline language-css"></code>
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</div>
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<p>The following CSS library files are loaded for use in this example to provide the styling of the table:</p>
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<ul>
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<li><a href="../../../../media/css/jquery.dataTables.css">../../../../media/css/jquery.dataTables.css</a></li>
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<li><a href="../../css/select.dataTables.css">../../css/select.dataTables.css</a></li>
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<li><a href="../../../Buttons/css/buttons.dataTables.css">../../../Buttons/css/buttons.dataTables.css</a></li>
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</ul>
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</div>
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<div class="ajax">
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<p>This table loads data by Ajax. The latest data that has been loaded is shown below. This data will update automatically as any additional data is
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loaded.</p>
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</div>
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<div class="php">
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<p>The script used to perform the server-side processing for this table is shown below. Please note that this is just an example script using PHP. Server-side
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processing scripts can be written in any language, using <a href="//datatables.net/manual/server-side">the protocol described in the DataTables
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documentation</a>.</p>
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</div>
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</div>
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</section>
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</div>
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<section>
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<div class="footer">
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<div class="gradient"></div>
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<div class="liner">
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<h2>Other examples</h2>
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<div class="toc">
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<div class="toc-group">
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<h3><a href="./index.html">Initialisation</a></h3>
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<ul class="toc active">
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<li><a href="./simple.html">Simple initialisation</a></li>
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<li><a href="./single.html">Single item selection</a></li>
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<li><a href="./multi.html">Multi item selection</a></li>
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<li><a href="./cells.html">Cell selection</a></li>
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<li><a href="./checkbox.html">Checkbox selection</a></li>
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<li><a href="./i18n.html">Internationalisation</a></li>
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<li><a href="./blurable.html">Blur selection</a></li>
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<li><a href="./deferRender.html">Defer rendering</a></li>
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<li><a href="./buttons.html">Buttons</a></li>
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<li class="active"><a href="./reload.html">Retain selection on reload</a></li>
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</ul>
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</div>
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<div class="toc-group">
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<h3><a href="../styling/index.html">Styling</a></h3>
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<ul class="toc">
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<li><a href="../styling/bootstrap.html">Bootstrap styling</a></li>
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<li><a href="../styling/foundation.html">Foundation styling</a></li>
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<li><a href="../styling/jqueryui.html">jQuery UI styling</a></li>
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</ul>
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</div>
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<div class="toc-group">
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<h3><a href="../api/index.html">API</a></h3>
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<ul class="toc">
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<li><a href="../api/events.html">Events</a></li>
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<li><a href="../api/get.html">Get selected items</a></li>
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<li><a href="../api/select.html">Select items</a></li>
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</ul>
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</div>
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</div>
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<div class="epilogue">
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<p>Please refer to the <a href="http://www.datatables.net">DataTables documentation</a> for full information about its API properties and methods.<br>
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Additionally, there are a wide range of <a href="http://www.datatables.net/extensions">extensions</a> and <a href=
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"http://www.datatables.net/plug-ins">plug-ins</a> which extend the capabilities of DataTables.</p>
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<p class="copyright">DataTables designed and created by <a href="http://www.sprymedia.co.uk">SpryMedia Ltd</a> © 2007-2015<br>
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DataTables is licensed under the <a href="http://www.datatables.net/mit">MIT license</a>.</p>
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</div>
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</div>
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</div>
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</section>
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</body>
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</html>
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