title: make a Placeholder not disappear when typing
body: <p>I've seen on some occasions people having issues with their placeholders not disappearing when they start typing inside the input. That's actually what I want.</p>
  
  <p>On my register form I've got a captcha verification in the shape of " 24 - 3 + 6 = ? "</p>
  
  <p>What I wanted to do is having this calcul not outside the input, but actually inside, and the user's answer would be typed after the calcul ( by setting a padding-left in the input to make the text starts after the calcul ).</p>
  
  <p>Is it possible to get my placeholder to stick even when the user starts typing ?</p>
  
  <p>Others suggestions are welcomed aswell if you have a clean alternative for what I am trying to do.</p>
  
  <p>As always, thanks a lot for your help !</p>