title: Javascript - accessing elements from an unopened page
body: <p>My question is somewhat difficult to explain. What I am trying to do is, I have a button on a certain page. When I press that button, I must be able to access elements of a form that is located on another page (<strong>without having the other page open</strong>).</p>
  
  <p>Pressing that button will edit some of the elements in the form from that "unopened" page, and then post it, all this without opening any extra popup/tab/window. After the form has been posted, the button will disappear.</p>
  
  <p>The form in question contains unique parameters that can't be retrieved without accessing its particular page, so I cannot emulate the form in standalone.</p>
  
  <p>Some of my guesses are to use a dynamic iframe set to "display: none", or Ajax, but otherwise I'm not exactly sure if it is possible and how to do it.</p>
  
  <p>Would anybody have some ideas? (sorry if the question isn't very clear, I tried my best to describe the problem)</p>