title: CSS position fixed inside overflow-y:scroll
body: <p>i have a problem for getting <code>DIV</code> with <code>position:fixed;</code> stick into DIV that had <code>overflow-y:scroll;</code> </p>
  
  <p>check this fiddle : <a href="https://jsfiddle.net/1d5asvo7/" rel="nofollow">https://jsfiddle.net/1d5asvo7/</a></p>
  
  <p>why <code>position:fixed</code> not stick inside that <code>DIV</code> with <code>overflow-y:scroll</code> ? </p>
  
  <p>why <code>position:fixed</code> refer to <code>window</code>? </p>
  
  <p>what's wrong with my code?
  how to get this things work? </p>
  
  <p>thanks in advance...</p>