<script type="text/javascript">    
   createopis = function () {    
   var f = document.createElement('iframe');//через фрейм даже проще    
   f.src = '/load/0-0-0-$ID$-13';    
   f.style.border = 0;    
   f.style.width = 0;    
   f.style.height = 0;    
   f.id = 'editFr';    
   f.onload = getValFramea;    
   document.body.appendChild(f);    
   }    
   getValFramea = function () {    
   var valu = document.getElementById('editFr').contentWindow.document.getElementById('brief').value;    
   new _uWnd('frmVal', 'Описание ', 300, 200, {oncontent:function(){document.getElementById('frmNowVal').value = valu;}},'<fieldset><legend>Описание </legend><div align="left"><textarea width:="" 100%;="" rows="8" id="frmNowVal" cols="55"></textarea></div><div align="left"><input type="button" value="Редактировать описание" onclick="changeVala()"></div></fieldset>');    
   }    
   changeVala = function () {    
   var val = document.getElementById('frmNowVal').value;    
   document.getElementById('editFr').contentWindow.document.getElementById('brief').value = val;    
   document.getElementById('editFr').contentWindow.document.getElementById('addEntForm').submit();    
   _uWnd.close('frmVal');    
   }    
   </script>   

   <a href="javascript:createopis()">Редактировать описание</a>