Web Design in a Nutshell, 3rd Edition

Frame Margins

As you probably already know, browsers hold a margin space on all sides of the browser window, preventing a document’s contents from displaying flush against the edge of the window. The width of the margin varies from browser to browser.

Frames have margin attributes that allow you to control (or remove) the margins on any frame-enabled browser. To adjust the top and bottom margins of a frame, specify a number of pixels for the marginheight attribute. Use the marginwidth attribute to specify the amount of space for the left and right margins. They can be combined as shown in the example in Figure 14-6.

The example shows the same HTML document (containing only a graphic) loaded into two frames within a frameset. The left frame has specific margins set. The right frame has its margins set to zero, allowing the contents of the frame to be positioned right up against the edges of the frame.