<tr bgcolor="#EDEDE2">?
            <td class="main">Opcja 1 = <? echo opcjajeden(); ?> Razy</td>
            <td class="main"><?php

    tep_draw_checkbox_field(opcjajeden, 'tak', true);
                        ?></td>
          </tr>    
          <tr bgcolor="#EDEDE2">?
            <td class="main">Opcja 2 = <? echo opcja2(); ?> Razy</td>
            <td class="main"><?php
    tep_draw_checkbox_field('opcja2', 'tak', true);
            ?></td>
          </tr>

<input type=checkbox id=jeden onclick="document.getElementById('dwa').checked=(this.checked)?0:0">
<input type=checkbox id=dwa onclick="document.getElementById('jeden').checked=(this.checked)?0:0">