How to get the current selection in HTML rather than plaintext

get_selection_html.coffee

getSelectionHTML = ->
    # Everyone but IE supports DOM selections
    if window.getSelection
        sel = window.getSelection()
    # IE Selections (Must come last to avoid messing with Opera)
    else if document.selection    
        return document.selection.createRange().htmlText
    # Fail safely
    else
        return ""

    if sel.getRangeAt
        # Everything but IE and old Safari
        range = sel.getRangeAt(0)
    else 
        # Old Safari
        range = document.createRange()
        range.setStart(sel.anchorNode, sel.anchorOffset)
        range.setEnd(sel.focusNode, sel.focusOffset)

    # Convert the document fragment to a string
    div = document.createElement('div')
    div.appendChild(range.cloneContents())
    return div.innerHTML

# For those of you who can't readily compile CoffeeScript into Javascript,
# 1. Visit http://jashkenas.github.com/coffee-script/
# 2. Click "Try CoffeeScript" and paste this into the left-hand pane
# 3. Copy the result from the right-hand pane.