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              <h1>Dynamic javascript Document creation</h1>

<h2>Parsed title: <span id="title"></span></h2>

<iframe id="iframe"></iframe>

              h1, h2 {
  text-align: right;

iframe {
  position: absolute;
  height: 100%;
  width: 100%;
  padding: 0;
  border: 0;
  margin: 0;
  left: 0;
  top: 0;

              doc2html = (doc) ->
  (new XMLSerializer).serializeToString doc

text2html = (t) ->
  t.replace(/&/g, '&amp;').replace(/</g, '&lt;')

doc = document

# show our own source, in the bg iframe document
html = doc2html doc

show = doc.getElementById 'title'
frame = doc.getElementById 'iframe'

# create a new empty document (without a title)
src = doc.implementation.createHTMLDocument ''

# copy the current document's contents to it
src.write html
# read out the page's title:
show.textContent = src.title

# repeat, but this time show the page's source:
html = text2html html
src.write "<!DOCTYPE><html><pre>#{html}</pre></html>"

# show our new doc in our background iframe:

copyDoc = (src, dst) ->
  src_root = src.documentElement
  new_root = dst.importNode src_root, true
  dst.replaceChild new_root, dst.documentElement

copyDoc src, frame.contentDocument

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