msgWindow=window.open("test.html", "NameofWindow", "toolbar=no, width=350, height=400, directories=no, status=no, scrollbars=yes, resize=no, menubar=no")
To see what this window would look like, press this button:
There are many other things that can be done with windows. You can write information to them, such as form data, and you can use them as remotes to navigate around a site. I'm sure there are about a million other ideas for using them, but I'm not going to go over all of them this week.