Copy and Paste the code below in the <HEAD> </HEAD> tags of your html.
You may customize this part of the script only:
toolbar=1, scrollbars=1, location=1, statusbar=1, menubar=1, resizable=1, width=500, height=500
1=yes
0=No
For example, if you don't want any scrollbars in your popup window then change scrollbars=1 to scrollbars=0. That's what you do to each one. Also you can change the width and height of the popup window.