title: iPhone Attributed String
body: <p>Any ideas on how to get the functionality of an attributed string on an iPhone.</p>
  
  <p>Specifically, I am writing out chemical compounds and want to properly display subscripts:  for example:</p>
  
  <p>H<sub>2</sub>O   (the 2 should be a subscript)</p>
  
  <p>Thanks for any suggestions</p>