Colored Table Cell On Select

colored-table-cell-on-select.htm

<form method="post">
<select name="cell" size="1">
<option></option>
<option value="a">A</option>
<option value="b">B</option>
<option value="c">C</option>
</select>
<input name="submit" type="submit" value="Submit">
</form>

<style type="text/css">
<!--
table td {
border: 1px solid;
}

<?php
if (isset($_POST['cell']))
        {
        echo "td.{$_POST['cell']} {background:yellow;}";
        }
?>

-->
</style>

<table>
    <tr>
        <td class="a">Cell A</td>
        <td class="b">Cell B</td>
        <td class="c">Cell C</td>
    </tr>
</table>