Javascript Dialog Box

I'm attempting to open a modal dialog box from a parent
window. The dialog box opens fine with the code below associated with the
parent. In the child window, I have a button with the simple self.close()
code associated with it. Obviously, I want to use the button to close the
child window (I've also tried window.close()). When the button is clicked,
the dialog box closes, but the info.aspx page is then re-displayed in
another regular window that opens. I found some reference to the problem on
the web with an explanation that it only occurs in IE after version 5, but
I've found no solution. ...and it still occurs in both IE6 and IE7. Code: