how to set caret pos in contentEditable element

if you want to set caret pos in contentEditable element, you have to go though all children element to find that position. At least this the way i can found.

and here is the example, just go thought the DOM tree by 2 level.

    setPos: (pos) ->
      _pos = pos
      if oWindow.getSelection
        range = oDocument.createRange()
        for node in @domInputor.childNodes
          range.selectNode(node)
          range_content = range.toString()
          if _pos > range_content.length
            _pos -= range_content.length
            continue
          if node.childNodes.length > 0
            _node = $(":contains('"+range_content+"')", node)[0]
            range.setStart(_node?.lastChild || node.lastChild, _pos)
          else
            range.setStart(node, _pos)
          range.collapse(true)
          sel = oWindow.getSelection()
          sel.removeAllRanges()
          sel.addRange(range)
          break

      @domInputor