Is there a way to get the html string of a JavaScript Range Object in W3C compliant browsers?

For example, let us say the user selects the following: Hello <b>World</b>

It is possible to get Hello World as a string using the Range.toString() method.
(In Firefox, it is also possible using the document's getSelection method.)

But I can't seem to find a way to get the inner HTML.

After some searching, I've found that the range can be converted to a DocumentFragment Object.

But DocumentFragments have no innerHTML property (at least in Firefox; have not tried Webkit or Opera).

Which seems odd to me: It would seem obvious that there should be some way to acces the selected items.

I realize that I can create a documentFragment, append the document fragment to another element, and then get the innerHTML of that element.

But that method will auto close any open tags within the area I select.

Besides that there surely is an obvious better way than attaching it to the dom just to get it as a string.

So, how to get the string of the html of a Range or DocFrag?