The HTML is here:
<table class="table">
<caption>My testing Table</caption>
<tr>
<td class=""><span>data-1</span></td>
<td>data-2</td>
</tr>
<tr>
<td>data-3</td>
<td><span>data-4</span></td>
</tr>
</table>
The Script is:
// ONLINE JQUERY LIBRARY IS CONNECTED
<script src="https://code.jquery.com/jquery-1.10.2.js"></script>
<script>
$(document).ready(function()
{
// FINDS SPAN TAG IN CLASS TABLE AND CHANGE ITS CSS STYLE
$(".table").find("span").css({"color":"blue","background":"lightpink"});
});
</script>
For any reference visit: http://www.w3schools.com/jquery/traversing_find.asp