Jquery - Select nth child in an HTML Table

The following code example illustrates modifying an nth child in an HTML table

<!DOCTYPE html>
<html>
<head>
        <script src="js/jquery-1.9.1.min.js"></script>
<script>
$(document).ready(function(){

$('table td:nth-child(2) input').focus(
function() {

   $(this).parent().next().css("background-color","#00FF00");

});
$('table td:nth-child(2) input').blur(
function() {

   $(this).parent().next().css("background-color","#FFFFFF");

});

});
</script>
</head>

<body>
<table>
<tr>
<td>Input</td>
<td>Type</td>
<td>Current</td>
</tr>
<tr>
<td>FirstName</td>
<td><input type="text"></td>
<td></td>
</tr>
<tr>
<td>LastName</td>
<td><input type="text"></td>
<td></td>
</tr>
</table>
</body>
</html>

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