Ah, I believe you mean a Javascript Window.
Do the following:
window.open("url"_blank","toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no, width=400, height=500");
If thats not enough information, you can find information on
www.w3schools.com and remember Google is your friend