Today I started to write my own W3c Range Implementation for Internet Explorer. The implementation contains a Selection object and a Range object.

setStart(), setEnd(), collapse(), startContainer, endContainer, startOffset, endOffset and collapsed have been implemented so far.

An example of what is possible yet:

<script src="function.prototype.js" type="text/javascript" />
<script src="range.js" type="text/javascript" />
<script type="text/javascript">
  window.onload = function () {
    var sel   = new Selection();
    var range = new Range();

    range.setStart(someTextNode, 4);
    range.setEnd(someElementNode, 2);
    sel.addRange(range);
  }
</script>

The result will be exactly the same for Internet Explorer as for browsers which implement W3c Range correctly.

Also the decomposition of an Internet Explorer TextRange to a W3c Range is possible. By this, you are allowed to retrieve the startContainer and startOffset properties of the current selection. pretty neat!

an example of what is possible so far