noframes
 

Because the past search engine to frames (cutting page) label is not very able to support, so in order to solve the search engines can't read the content of frames, and have an alternative solution for < noframes > tag.

< noframes > tag, original intention is used to help when the search engine can't read frames tag, require the user to select update browser used, but in the use of mind under, he has become a method of cheating.