Other times the dividing line between frames is invisible. Frames are not just divisions of a single page. Instead, each frame is a separate page with its own properties and behaviors. Sometimes web pages are divided into frames that serve no useful purpose. Frames are used only because the author knew how to create them.
Frames take longer to load because each frame is a separate web page.
Some older browsers can't interpret and display frames correctly. The most serious problem that can arise occurs when a web page with frames is linked to an outside web site. Without proper HTML coding, the new web site opens inside one of the frames instead of occupying the entire screen. If the new web site also uses frames, the actual text that a student needs to read may occupy such a small part of the screen that reading is impossible. Frames within frames within frames leads to a great amount of frustration for users.