Slide-in Menu - Open new window

[molly]

G'day, I have installed Dynamic-FX Slide-In Menu (v 6.5) and it works great. When I click on a link it opens in a new window but I want it to open in a specific size window (300x400) without any toolbars or scrollbars. I want it to open like a pop-up window. Here is an example of the code.

ssmItems[12]=["Flower", "fs/wfshow.html", "_new"]

My knowledge of scripts is limited. (Obviously)
Help would be appreciated

http://www.dynamicdrive.com/dynamicindex1/davidmenu.htm