If you specify no attributes for the window, it opens at the size and with the attributes of the window that opened it. Specifying any attribute for the window automatically turns off all other attributes that are not explicitly turned on. For example, if you set no attributes for the window, it might open at 640 x 480 pixels and have a navigation bar, location toolbar, status bar, and menu bar. If you explicitly set the width to 640 and the height to 480 and set no other attributes, the window opens at 640 x 480 pixels and has no navigation bar, no location toolbar, no status bar, no menu bar, no resize handles, and no scroll bars.
Yaldex PopUp is the most powerful application for creation popup windows, includes dozens adjusted tools and additional scripts.