Originally Posted by yznf
Does anyone know the default size of a popup window when using window.open()?
The default is whatever your visitor has their browser set to use. A lot of people have it set to open in a new tab in the existing browser window and so it will then be whatever size they currently have the browser open to. Another common size for people to have it set to if they do allow it to open a new browser window is the available space on their screen (ie the screen resultion less whatever fixed toolbars they have defined).