JSFiddle - React, Tailwind, and code Playground

HTML

<link href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css" rel="stylesheet">
<div class="container-fluid">
<div class="span9">
<table class="table table-striped" id="users">
<thead>
<tr>
    <th class="header"></th>
    <th class="header">Nick</th>
    <th class="header">Date registered</th>
    <th class="header">Type</th>
    <th class="header">Locked</th>
    <th class="header">Action</th>
</tr>
</thead>
<tbody>
<tr class="myRow">
    <td>1</td>
    <td>admin</td>
    <td>2011-12-31 20:35:00</td>
    <td>Admin</td>
    <td>No</td>
    <td>
        <div class="btn-group" style="display: none">
            <a class="btn dropdown-toggle" data-toggle="dropdown" href="#">Action<span class="caret"></span></a>
            <ul class="dropdown-menu">
                <li><a id="edit" href="#">Edit</a></li>
                <li><a id="delete" href="#">Delete</a></li>
            </ul>
        </div>
    </td>
</tr>
<tr class="myRow">
    <td>
        2
    </td>
    <td>
        demo
    </td>
    <td>
        2011-12-31 20:35:00
    </td>
    <td>
        Normal
    </td>
    <td>
        No
    </td>
    <td>
        <div class="btn-group" style="display: none">
            <a class="btn dropdown-toggle" data-toggle="dropdown" href="#">Action<span class="caret"></span></a>
            <ul class="dropdown-menu">
                <li><a id="edit" href="#">Edit</a></li>
                <li><a id="delete" href="#">Delete</a></li>
            </ul>
        </div>
    </td>
</tr>
<tr class="myRow">
    <td>
        3
    </td>
    <td>
        test
    </td>
    <td>
        2012-01-07 00:32:58
    </td>
    <td>
        Normal
    </td>
    <td>
        No
    </td>
    <td>
        <div class="btn-group" style="display: none">
            <a class="btn dropdown-toggle" data-toggle="dropdown" href="#">Action<span class="caret"></span></a>
            <ul class="dropdown-menu">
                <li><a id="edit" href="#">Edit</a></li>
                <li><a...

JavaScript

jQuery('.myRow').mouseover(function() {
    jQuery(this).find('div:first').show();
}).mouseout(function() {
    jQuery(this).find('div:first').hide();
});