JPG files, are high-resolution files used for photos and other graphics that have a lot of details. A two inch by two inch GIF file will display faster than a JPG file of the same size. However, if the GIF file is an animation, like a cartoon that moves on the screen or a graphic with moving text, then the size of the GIF file is multiplied by the number of images that are required to produce the animation. In the end, the decision about whether to use GIF files or JPG files and how large to make them is a trade off between download speed and image quality. The most common way to control the page layout of a web page is with table commands.
Tables allow the designer to divide up the text and graphics into rows and columns of table cells.
Tables are great because they allow web information to be displayed like a newspaper page and can fill up as much of the display window as possible without the need to scroll down. Relative definitions require the browser to compute the final size of each table cell and although that looks nicer it also takes longer to display. A web page is also composed of other elements that the viewer cannot see. Each of these design elements enhance the capability and presentation of a web page. In turn they also add to the complexity of the processing of information which may affect the time required to display the web page.