Live-Search on a table

This fiddle demonstrates how one may execute a dynamic search on a table's unique identifier column. This fiddle is a response to stackoverflow issue: http://stackoverflow.com/questions/12433304/live-search-through-table-rows

HTML

<table>
    <tr>
        <th>Unique ID</th>
        <th>Random ID</th>
    </tr>
    <tr>
        <td>214215</td>
        <td>442</td>
    </tr>
    <tr>
        <td>1252512</td>
        <td>556</td>
    </tr>
    <tr>
        <td>2114</td>
        <td>4666</td>
    </tr>
    <tr>
        <td>3245466</td>
        <td>334</td>
    </tr>
    <tr>
        <td>24111</td>
        <td>54364</td>
    </tr>
</table>
<br />
<input type="text" id="search" placeholder="  live search"></input>

CSS

table, tr, td, th {
    border: 1px solid blue;
    padding: 2px;
}
table th {
    background-color: #999999;
}

JavaScript

$("#search").keyup(function () {
    var value = this.value.toLowerCase().trim();

    $("table tr").each(function (index) {
        if (!index) return;
        $(this).find("td").each(function () {
            var id = $(this).text().toLowerCase().trim();
            var not_found = (id.indexOf(value) == -1);
            $(this).closest('tr').toggle(!not_found);
            return not_found;
        });
    });
});