Okay so here we go, anyone who has ever designed a site has made one or more of these mistakes .. Come with me and let’s go down the list.
Using Frames
Often web designers break up the browser window with separate sub-windows. These divisions are called frames. Although frames are supposed to help web visitors navigate easier, frequently they just confuse them. When clicking on an item to move forward, visitors are uncertain what information will appear where, or in what sub-window. Another difficulty is many framed web sites depend on specific screen sizes. When a visitor with a different sized screen tries to view the framed page, all of the site’s information may be garbled or misplaced. Designers who insist on using frames should create a no-frame version of their site, as well, for the people who prefer it.

