JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-1.12.0.min.js"></script>
<table>
<tr class="row_header thin_border"> 
    </tr><tr id="id33192010101533333"  seq="2">
    <td>20101015</td>
    <td>600</td>
    <td>730</td>        
    <td><a href="#" onclick="deleteActivity(3319,20101015,1);">Click</a></td>
    <td><a href="#" onclick='selectEditActivity("id3319201010153333");'>Click</a></td>
    </tr>

    <tr id="id3319201010151111"  seq="3">
    <td>20101015</td>
    <td>600</td>
    <td>730</td>        
    <td><a href="#" onclick="deleteActivity(3319,20101015,1);"> <img src="/bbhtml/img/deleteAction.png"></a></td>
    <td><a href="#" onclick='selectEditActivity("id3319201010151111");'><img src="/bbhtml/img/editAction.png"></a></td>
    </tr>
<table>

JavaScript

var seq = $('#id33192010101533333').attr("seq");
alert(seq);

var seq = document.getElementById("id3319201010151111").getAttribute("seq");
alert(seq);