استفسارين

<table class="forumline" width="50%" border="0" cellspacing="1" cellpadding="0" id="chatbox_container">
    <tr>
        <td class="row1" valign="top" align="center">
            <div id="chatbox_portal" style="height:300px;"></div>
            <script type="text/javascript">
                insertChatBox('chatbox_portal', '{U_FRAME_CHATBOX}');
            </script>
        </td>
    </tr>
</table>

<table width="50%">
    <tr>
        <td width="50%">&nbsp;</td>
        <td align="right" width="20">
            <img src="http://2img.net/i/fa/resize.gif" onmousedown="javascript:resizeElement(event, 'chatbox_portal');" alt="" style="cursor:se-resize;" />
        </td>
    </tr>
</table>