<form name="mainf" onsubmit="javascript:dosub();return false;">
<div align="center">
<table>
    <tbody>
        <tr>
            <td>
                <div id="cimg1">
                    <img width="35" height="55" src="images/capchs/7.png">
                </div>
            </td>
            <td>
                <div id="cimg2">
                    <img width="35" height="55" src="images/capchs/1.png">
                </div>
            </td>
            <td>
                <div id="cimg3">
                    <img width="35" height="55" src="images/capchs/3.png">
                </div>
            </td>
            <td>
                <div id="cimg4">
                    <img width="35" height="55" src="images/capchs/3.png">
                </div>
            </td>
        </tr>
    </tbody>
</table>
</div><br>
<div align="center">
<input type="text" name="capcha" value="" style="width:200px;height:30px;font-size:15px;">
</div><br><br>
<div align="center">
<input type="button" value="ПРОДОЛЖИТЬ" style="width:200px;height:30px;font-size:15px;" onclick="javascript:dosub()">
</div>
</form>