i suggest not to use iframe tag. Because if you use it and if there is multi scrolling that is scrolling in the iframe and the main page in which it resides; use of the scroll wheel and button in the mouse becomes unneccessarily tedious. If there are some other options instead of using iframe better option will be go for that. I suggest to omit the ifram in you page if possible.

very simple task, that many people prefer not to use. I agree the scrolling becomes a pain, but when it is used right, it is very effective and nice looking. I like to use it for news and such, like on the front page for news. ALso, its eeasy for when you don't want a page to reload everytime they click on the navigation, its really effective for navigation and banners that don't need to load every time they go to a new page, which allows faster viewing of the webpage.