Showing Users When Text Changes

A powerful Ajax technique is to change the data displayed in a page using <div>, <span>, or other HTML elements or by using HTML controls like text fields. Ajax applications can change the data in a page after consulting with the server — but without consulting with the user. For example, you may have altered the data in a table of data when the data on the server has changed.

That means that the user might not notice that the data has changed. So be careful about how much you change in a Web page and where because the user might miss it.