Getting Current Page Problem

Getting Current Page Problem

Sorry Guys, but i really have a problem with understanding how i can get access to the current page.
I want JQM to change a style by clicking an element. (clicking ALWAYS the element in the ACTIVE PAGE, cause i am not interested in previous or next pages)

First of all i fire this:
  1. $(document).on("pagecontainershow", function() { 
  2.       loadClickEvent();
  3. });
So, this should load the Click event on every page that occurs...

This is the related function:
  1. function loadClickEvent() {
  2.       // only way to get the active page?!
  3.       var $page = $(":mobile-pagecontainer").pagecontainer("getActivePage");
  4.       
  5.       // buttonX should change CSS every time its clicked in the ACTIVE PAGE
  6.       $page.find("#buttonX").click(function() {
  7.             $("#fixed-screen").css("display", "block");
  8.       });
  9. }
But this code makes the CSS-change only ONE TIME... so it is working actual. but when i click this #buttonX AGAIN (on the SAME, CURRENT, ACTIVE PAGE), nothing happens. it is not changing again, i dont now why.

I tried many version of this function, like only  $("#buttonX") instead of  $page.find("#buttonX"), or  $page.find ("#fixed-screen"). instead of  $("#fixed-screen")... or even getting the ( getActivePage) again in the click-funtion (line 7)... nothing works.
I ask myself, why is it so hard to just access elements in the active page with JQM? I make bug projects, and i always need this so often, but i never need to get access to next or previous pages, so why is this active-page-access so hard to get?

You know, i come from Mootools, and i just want the function  loadClickEvent to make the button  buttonX changing this CSS EVERY time i click it (on the ACTIVE PAGE).

Please help me, thanks