Short description of Yaldex PopUp 4.9 4.9: This WYSIWYG program creates JavaScript and HTML code to open an URL in a new (PopUp) window. You can specify the properties of the new window (whether it is resizable, has a menu bar, a so on). For example, you can use it to open a larger image in a separate window when the visitor clicks a thumbnail image. You can make the new window with exact size of the image.