Fixed the security hole (really, I'm a moron - used $failed > $threshold instead of $failed >= $threashold) and patched up some...erm... math issues
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>{$lang_table_cell_title}</title>
<script language="javascript" type="text/javascript" src="../../tiny_mce_popup.js"></script>
<script language="javascript" type="text/javascript" src="../../utils/mctabs.js"></script>
<script language="javascript" type="text/javascript" src="../../utils/form_utils.js"></script>
<script language="javascript" type="text/javascript" src="jscripts/cell.js"></script>
<link href="css/cell.css" rel="stylesheet" type="text/css" />
<base target="_self" />
</head>
<body id="tablecell" onload="tinyMCEPopup.executeOnLoad('init();');" style="display: none">
<form onsubmit="updateAction();return false;" action="#">
<div class="tabs">
<ul>
<li id="general_tab" class="current"><span><a href="javascript:mcTabs.displayTab('general_tab','general_panel');" onmousedown="return false;">{$lang_table_general_tab}</a></span></li>
<li id="advanced_tab"><span><a href="javascript:mcTabs.displayTab('advanced_tab','advanced_panel');" onmousedown="return false;">{$lang_table_advanced_tab}</a></span></li>
</ul>
</div>
<div class="panel_wrapper">
<div id="general_panel" class="panel current">
<fieldset>
<legend>{$lang_table_general_props}</legend>
<table border="0" cellpadding="4" cellspacing="0">
<tr>
<td><label for="align">{$lang_table_align}</label></td>
<td>
<select id="align" name="align">
<option value="">{$lang_not_set}</option>
<option value="center">{$lang_table_align_middle}</option>
<option value="left">{$lang_table_align_left}</option>
<option value="right">{$lang_table_align_right}</option>
</select>
</td>
<td><label for="celltype">{$lang_table_cell_type}</label></td>
<td>
<select id="celltype" name="celltype">
<option value="td">{$lang_table_td}</option>
<option value="th">{$lang_table_th}</option>
</select>
</td>
</tr>
<tr>
<td><label for="valign">{$lang_table_valign}</label></td>
<td>
<select id="valign" name="valign">
<option value="">{$lang_not_set}</option>
<option value="top">{$lang_table_align_top}</option>
<option value="middle">{$lang_table_align_middle}</option>
<option value="bottom">{$lang_table_align_bottom}</option>
</select>
</td>
<td><label for="scope">{$lang_table_scope}</label></td>
<td>
<select id="scope" name="scope">
<option value="">{$lang_not_set}</option>
<option value="col">{$lang_table_col}</option>
<option value="row">{$lang_table_row}</option>
<option value="rowgroup">{$lang_table_rowgroup}</option>
<option value="colgroup">{$lang_table_colgroup}</option>
</select>
</td>
</tr>
<tr>
<td><label for="width">{$lang_table_width}</label></td>
<td><input id="width" name="width" type="text" value="" size="4" maxlength="4" onchange="changedSize();" /></td>
<td><label for="height">{$lang_table_height}</label></td>
<td><input id="height" name="height" type="text" value="" size="4" maxlength="4" onchange="changedSize();" /></td>
</tr>
<tr id="styleSelectRow">
<td><label for="class">{$lang_class_name}</label></td>
<td colspan="3">
<select id="class" name="class">
<option value="" selected="selected">{$lang_not_set}</option>
</select>
</td>
</tr>
</table>
</fieldset>
</div>
<div id="advanced_panel" class="panel">
<fieldset>
<legend>{$lang_table_advanced_props}</legend>
<table border="0" cellpadding="0" cellspacing="4">
<tr>
<td class="column1"><label for="id">{$lang_table_id}</label></td>
<td><input id="id" name="id" type="text" value="" style="width: 200px" /></td>
</tr>
<tr>
<td><label for="style">{$lang_table_style}</label></td>
<td><input type="text" id="style" name="style" value="" style="width: 200px;" onchange="changedStyle();" /></td>
</tr>
<tr>
<td class="column1"><label for="dir">{$lang_table_langdir}</label></td>
<td>
<select id="dir" name="dir" style="width: 200px">
<option value="">{$lang_not_set}</option>
<option value="ltr">{$lang_table_ltr}</option>
<option value="rtl">{$lang_table_rtl}</option>
</select>
</td>
</tr>
<tr>
<td class="column1"><label for="lang">{$lang_table_langcode}</label></td>
<td>
<input id="lang" name="lang" type="text" value="" style="width: 200px" />
</td>
</tr>
<tr>
<td class="column1"><label for="backgroundimage">{$lang_table_bgimage}</label></td>
<td>
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><input id="backgroundimage" name="backgroundimage" type="text" value="" style="width: 200px" onchange="changedBackgroundImage();" /></td>
<td id="backgroundimagebrowsercontainer"> </td>
</tr>
</table>
</td>
</tr>
<tr>
<td class="column1"><label for="bordercolor">{$lang_table_bordercolor}</label></td>
<td>
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><input id="bordercolor" name="bordercolor" type="text" value="" size="9" onchange="updateColor('bordercolor_pick','bordercolor');changedColor();" /></td>
<td id="bordercolor_pickcontainer"> </td>
</tr>
</table>
</td>
</tr>
<tr>
<td class="column1"><label for="bgcolor">{$lang_table_bgcolor}</label></td>
<td>
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><input id="bgcolor" name="bgcolor" type="text" value="" size="9" onchange="updateColor('bgcolor_pick','bgcolor');changedColor();" /></td>
<td id="bgcolor_pickcontainer"> </td>
</tr>
</table>
</td>
</tr>
</table>
</fieldset>
</div>
</div>
<div class="mceActionPanel">
<div>
<select id="action" name="action">
<option value="cell">{$lang_table_cell_cell}</option>
<option value="row">{$lang_table_cell_row}</option>
<option value="all">{$lang_table_cell_all}</option>
</select>
</div>
<div style="float: left">
<div><input type="button" id="insert" name="insert" value="{$lang_update}" onclick="updateAction();" /></div>
</div>
<div style="float: right">
<input type="button" id="cancel" name="cancel" value="{$lang_cancel}" onclick="tinyMCEPopup.close();" />
</div>
</div>
</form>
</body>
</html>