Javascript/Flash error

[pafke]

Hi,
I'm currently working on a Flash pop-up that can be integrated in several websites. I'm currently testing the code. I've got a flash file with a semi-transparant background that loads over the complete page, it also closes the div with the flash content once the end of the swf is reached.

The thing is, I want to prevent the user from scrolling whilst the swf is active. That's why I disabled the overflow-Y.

Now I've got a javascript code that is supposed to change the body's overflow to visible again, and I'm calling to this code in the same frame as where I disable the div with the flash in it.

But for some reason it isn't working.

This is my complete Javascript code:

<script type="text/javascript">
<!-- Original: Gregor (legreg@legreg.de) -->
<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->

var ie4 = (document.all) ? true : false;
var ns4 = (document.layers) ? true : false;
var ns6 = (document.getElementById && !document.all) ? true : false;


function hidelayer(lay) {
  if (ie4) {document.all[lay].style.visibility = "hidden";}
  if (ns4) {document.layers[lay].visibility = "hide";}
  if (ns6) {document.getElementById([lay]).style.display = "none";}
}

function writetolayer(lay,txt) {
  if (ie4) {
    document.all[lay].innerHTML = txt;
  }
  if (ns4) {
    document[lay].document.write(txt);
    document[lay].document.close();
  }
  if (ns6) {
    over = document.getElementById([lay]);
    range = document.createRange();
    range.setStartBefore(over);
    domfrag = range.createContextualFragment(txt);
    
     while (over.hasChildNodes()) {
      over.removeChild(over.lastChild);
    }
     over.appendChild(domfrag);
  }
}


<!-- This is the part I added which I thought would show the scrollbar again after the flashpopup is finished -->
function showbar(){
	document.getElementsByName('body')[0].style.overflowY = 'visible';
}

</script>

And in the final frame of my flash animation I first stop the swf, and then call to both functions:

//stops the movie
stop();

//this is the code that triggers the function to hide the div, and the function that should show the scrollbar

getURL("javascript:showbar();");
getURL("javascript:hidelayer('newlayer');");


I've also got an online webtest here:
http://www.haragara.com/banner_test/

And I've included all the files in a zip

Can anyone tell me what I'm doing wrong?