What's Wrong With My Actionscript?

I’ve been tryign to create a centered pop up window (as per the kirupa tutorial), but every time you click on the button to launch the pop up it also replaces the original page (the one with the button) with a blank page.

Here’s my code for the button that launches the pop up…

on (release) {
//customize the window that gets opened
// 0 equals NO.
// 1 equals YES.
address = “www.recoverychild.com/recoverymailing.html”;
target_winName = “mailinglist”;
width = 300;
height = 200;
toolbar = 0;
location = 0;
directories = 0;
status = 0;
menubar = 0;
scrollbars = 0;
resizable = 0;
//sends data back to the function
openWinCentre(address, target_winName, width, height, toolbar, location, directories, status, menubar, scrollbars, resizable);
}

Here’s my code for the global actionscript…

_root.openWinCentre = function (url, winName, w, h, toolbar, location, directories, status, menubar, scrollbars, resizable) {
getURL (“javascript:var myWin; if(!myWin || myWin.closed){myWin = window.open(’” + 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);”);
}

Please help! What wrong in my actionscript???

Thanks in advance!!!