var end          ='<tr class="trebuchet-11-ner">'+ 
                    '<td height="35">&nbsp;</td>'+
                    '<td colspan="3"><table width="100%" border="0" cellspacing="0" cellpadding="0">'+
                        '<tr>'+ 
                         '<td width="12%"><a href="Javascript:resetta_form();" alt="Cancella"><img border="0" src="images/cancella.jpg" alt="Удалить"></a></td>'+
                          '<td width="88%"><img border="0" onCLick="Javascript:checkdata();" style="cursor:pointer" src="images/invia.jpg" alt="Послать"></a></td>'+
                        '</tr>'+
                      '</table></td>'+
                  '</tr>'+
                '</table>'+
              '</div></td>'+
          '</tr>'+
        '</table>'+
'</form></td>'+
 '</tr>'+
  '<tr>'+
    '<td><img src="images/form_giu.jpg" width="719" height="21"></td>'+
  '</tr>'+
'</table>';

document.write(end);