BrowserFullscreenScript for TWC - help needed.

[Jan]

Hello,
I tried to write a .js code which should create a button which makes a
TWC go into browserFullscreen respectively return to normal if the
Browser is in FullscreenMode.
As it is my first real code I do not even know how far I missed that goal.
Help on this would be very appreciated.

Yours Jan

PS:
If I understand correctly Eric's TiddlyTools ToggleFullscreen toggles
all Menus but leaves the Browser as it is. If there is another working
Plugin for TWC fullfilling this purpose please let me know.

<script label="Fullscreen">
//looks if the Browser is Fullscreenenabled
var fullscreenEnabled = document.fullscreenEnabled ||
document.mozFullScreenEnabled || document.webkitFullscreenEnabled;
//looks if the document is already in Fullscreen.
var fullscreenElement = document.fullscreenElement ||
document.mozFullScreenElement || document.webkitFullscreenElement;
//defines a browserspecific EXITFullscreen function
function exitFullscreen()
{
if(document.exitFullscreen)
{
document.exitFullscreen();
}
else if(document.mozCancelFullScreen)
{
document.mozCancelFullScreen();
}
else if(document.webkitExitFullscreen)
{
document.webkitExitFullscreen();
}
}
//defines a browserspecific ENTERFullscreen function
function goFullscreen()
{
if(element.requestFullscreen)
{
element.requestFullscreen();
}
else if(element.mozRequestFullScreen)
{
element.mozRequestFullScreen();
}
else if(element.webkitRequestFullscreen)
{
element.webkitRequestFullscreen();
}
else if(element.msRequestFullscreen)
{
element.msRequestFullscreen();
}
}
// This Function decides which Function should be used
//if the dokument is in Fullscreen it will exit otherwise it will
launch into fullscreen or call F11 as last option.
function toggleBrowserFullscreen(fullscreenEnabled,fullscreenElement)
{
if(fullscreenElement)
{
exitFullscreen
}
else if(fullscreenEnabled)
{
goFullscreen
}
else
{
SendKeys("{F11}") // ancient brute force method to toggle Fullscreen.
}
}
//create a button which is telling what will be done.
place.innerHTML=fullscreenElement?"Exit
Fullscreen":fullscreenEnabled?"Fullscreen":"toggleFullscreen";
toggleBrowserFullscreen(element);

</script>