JS to open sized & positioned newwindow fails

Anyone familiar with this?
(I searched here for the subject and found some exchanges from 2002 and 2005 that came close but didn’t seem to resolve themselves successfully.)

/*
on (release) {
getURL (“javascript:NewWindow=window.open(‘TriCarTop.html’,’’,‘width=700,height=644,left=0,top=0,toolba r=No,location=No,scrollbars=Yes,status=No, resizable=No,fullscreen=No’); NewWindow.focus(); setTimeout(‘NewWindow.moveTo(75,50)’,1500);void(0);”);
}
*/
It works but the opening is herky-jerky; the page opens in one place and then jumps to its correct position. It looks like a mistake.

So I modified it to remove the setTimeout and just changed the left and top entries from zeros to where I wanted it to open.
Like this:
/*
on (release) {
getURL (“javascript:NewWindow=window.open(‘TriCarTop.html’,’’,‘width=700,height=644,left=200,top=175,to olbar=No,location=No,scrollbars=Yes,status=No, resizable=No,fullscreen=No’); NewWindow.focus(); void(0);”);
}
*/
This works–but only sometimes. Results vary from one trial to another, even though I’m emptying browser cache each time.

Any ideas? TIA