How to refresh the document window?

At the end of my lenghthy script the display of the document does not reflect the work of the script.

I always must type CTRL+l to refresh the display.

Now I tried to use this function:

function ZRefresh() { // === Refresh screen =======================================================
  FcodeList = new Array(FCodes.KBD_REFRESHWIN);
  Fcodes(FcodeList);
}

But this does not the trick - I still need to use the keyboard myself...

Any suggestions?

Maybe a function to switch to master pages and back (igrnoring overwrites).

Better approches?