Problem with launching pop-up window under Windows version of IE

I wanted to load my main Flash movie in a separate centered window from my initial splash page. I found the Kirupa tutorial, “Launching a Centered Pop-Up Window”

which seemed perfect for my needs. It worked perfectly in every browser/OS combination but one: IE for Windows (any version). Since this is the browser/OS combination which most users will be using, this is a big problem. Here’s what’s happening. The splash page (splashpage.html) loads fine, but when you click on the button which is supposed to open the new window/movie, the following error is generated:

Line: 1
Char: 39
Error: Invalid argument.
Code: 0

What am I doing wrong? Thanks in advance for helping a newbie out! Here’s the ActionScript for the button:

on (release) {
// customize the window that gets opened
// 0 equals NO.
// 1 equals YES.
address = “mysite_main.html”;
target_winName = “Welcome”;
width = 820;
height = 620;
toolbar = 0;
location = 0;
directories = 0;
status = 0;
menubar = 0;
scrollbars = 1;
resizable = 0;
// sends data back to the function
openWinCentre(address, target_winName, width, height, toolbar, location, directories, status, menubar, scrollbars, resizable);

and here’s the ActionScript for the “actions” layer (as described in the Kirupa tutorial):

_root.openWinCentre = function(url, winName, w, h, toolbar, location, directories, status, menubar, scrollbars, resizable) {
getURL(“javascript:var myWin; if(!myWin || myWin.closed){myWin =’”+url+"’,’"+winName+"’,’"+“width=”+w+",height="+h+",toolbar="+toolbar+",location="+location+",directories="+directories+",status="+status+",menubar="+menubar+",scrollbars="+scrollbars+",resizable="+resizable+",top=’+((screen.height/2)-("+h/2+"))+’,left=’+((screen.width/2)-("+w/2+"))+’"+"’)}else{myWin.focus();};void(0);");