/td>
        <td>background image</td>
    </tr> 
    <tr valign="top">
        <td><code>fg</code></td>
        <td>foreground image</td>
    </tr>     
</table>

<h2>Optional Inputs</h2>

<p>Optional 'string', value pairs that may be used to modify the default computational settings.</p>

<table cellspacing="0" class="body" cellpadding="4" border="2">
    <colgroup>
        <col width="18%"><col width="18%"><col width="18%"><col width="46%">
    </colgroup>
    
    <thead>
        <tr valign="top">
     