function bbcode(bbdebut, bbfin)

      {
  
      var input = window.document.forme.commentaire;
  
      input.focus();
   
      if(typeof document.selection != 'undefined')
   
      {
   
      var range = document.selection.createRange();
  
      var insText = range.text;
   
      range.text = bbdebut + insText + bbfin;
  
      range = document.selection.createRange();
  
      if (insText.length == 0)
  
      {
 
      range.move('character', -bbfin.length);
  
      }
 
      else
 
      {
 
      range.moveStart('character', bbdebut.length + insText.length + bbfin.length);
  
      }
  
      range.select();
  
      }
 
      else if(typeof input.selectionStart != 'undefined')
  
      {
 
      var start = input.selectionStart;
  
      var end = input.selectionEnd;
  
      var insText = input.value.substring(start, end);
  
      input.value = input.value.substr(0, start) + bbdebut + insText + bbfin + input.value.substr(end);

      var pos;

      if (insText.length == 0)
  
      {

      pos = start + bbdebut.length;
  
      }

      else

      {
  
      pos = start + bbdebut.length + insText.length + bbfin.length;

      }

      input.selectionStart = pos;
 
      input.selectionEnd = pos;
  
      }
  
       

      else

      {

      var pos;
 
      var re = new RegExp('^[0-9]{0,3}$');
 
      while(!re.test(pos))

      {

      pos = prompt("insertion (0.." + input.value.length + "):", "0");

      }
 
      if(pos > input.value.length)
 
      {
  
      pos = input.value.length;
  
      }
 
      var insText = prompt("Veuillez taper votre texte");
  
      input.value = input.value.substr(0, pos) + bbdebut + insText + bbfin + input.value.substr(pos);
  
      }
  
      }
  
      function smilies(img)
 
      {

      window.document.forme.commentaire.value += '' + img + '';
 
      }