JavaScript allows you to create windows that pop up when the user clicks on a link. You can specify a size for the window and you can choose whether or not it will have all the attributes of a browser window, such as toolbar, location bar, etc.   After the user has read the information contained in the pop-up window, he/she can close the window. For an example, click here for one pop-up window and here for another.

 

Click here for pop-up Window #1.

Click here for pop-up Window #2.