<br><br><div id="titulo" class="t">   
<center>
    <table border="0" cellpadding="4" cellspacing="6">

      
    <tr>

        <td>&nbsp;
                 <input type="button" class="button white medium" onclick="pdf()" value="Generar Reporte" >
        </td>
        
    </tr>   

</table>
</center>

</div>
<br>
  
  <div  style="background-color:#FAFAFA ; width: 84%; height: 365px; margin: 5px 15px 10px 90px; padding: 1px 1px 5px 1px;">
        <div id="labor_academica" class="contenedor" style="background-color:#FAFAFA ; width: 100%; height: 362px;  padding: 5px 5px 5px 5px;">
            <iframe id="preview2" name="preview2" src="about:blank" style="width: 100%; height: 355px; "  frameborder="1"></iframe>

        </div>
   </div>
 
   <center>
       <table>
        <tr>
        <td align="CENTER">
        <input type='button' name='btnretornar' class="button white medium" onclick='retornar_menu_docente()' value='Retornar'>
        </td>
        </tr>
    </table>
   </center>