title: How to manipulate text in editable iFrame documents?
body: <p>I am wanting to create fancy "text-areas" like typeit.org has. I'm pretty sure they use iFrames with the iFrame doument's contentEditable value set to true, but how might the symbol buttons work? When using this technique, how do you replace the current selection inside the iFrame with a symbol or if nothing is selected, insert the symbol to the left of the cursor?
  <a href="http://currencies.typeit.org/" rel="nofollow">http://currencies.typeit.org/</a></p>