What should I do with code like qq paging?

The code similar to the qq paging is a page that shows all the infinitely downward display like QQ. it uses JS to determine whether the screen is accurate and load the next page. Qq paging code
Is a page that shows all the items like QQ
Infinitely downward

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When JavaScript is used to determine whether the screen is accurate, the next page is loaded.
Http://hi.baidu.com/%CB%AF%C3%CE%D6% AE %C1%FA/blog/item/828267126cbf4fd5c3fd7896.html

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Taking 20 records at a time, JS can determine whether the page is correct, call the function in the end, display loading, and append the callback content to the back.