title: Input type text with fraction
body: <p>I want to make it possible for visitors of my website to add fraction in a input text field.
  So if they push the '/' or a specific button on my website, in the text field a fraction line should popup and a number can be added in the numerator and denominator.
  The same I would do for the exponent, when push the '^' or a specific button.</p>
  
  <p>[edit] Maybe my question wasn't clear. I tried to create it myself, but I have really no idea how to start. I can create it in two separated fields, but I want the visitor to choose if he has to add a fraction. 
  I saw the solution in a flash website, but I thought with the introduction of html 5, flash would disappear.</p>