Refreshing technology has experienced approctoctional several stages:
First, add a key in the HTML file head, so that the page jumps to the specified page (including itself) after the set time; for example: Second, Use the frame and then refresh the frame content in the JS script. The above two ways will be reloaded, that is, refresh, give people a feeling not very good! So no refreshing technique appeared. Third, it is a variety of ways. An long width in many frames is set to 0, which is not visible, and then refreshes the hidden framework through the script timing, and then "writing" to the browsing framework. Most of the early chat rooms use this technology. In fact, it is true that the two technologies are implemented, and they can even achieve local refresh: four, XMLHTTP technology, can access the ASP page, ASPX page, WebService, etc. via XMLHTTP.
