function bbcode(bbdebut, bbfin, input)
{
  input.focus();
  if ((bbdebut.indexOf("=null]") != -1) || (bbdebut.indexOf("=NULL]") != -1)) return false;
  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("Enter text");
    input.value = input.value.substr(0, pos) + bbdebut + insText + bbfin + input.value.substr(pos);
  }
}

function smilies(img)
{
  window.document.formulaire.message.value += '' + img + '';
}