As mentioned above, a web tag system will perform the task of storing your favorite URL's in the remote host instead of the local one to prevent some damages from reinstalling your machine or facilitate your access from outside your home or office. On the whole, the web tag system in this article will achieve the listed goals, as follows:

·         Displaying the web tag category list

·         Moving the web tag category

·         Displaying the web tag list

·         Moving a web tag

·         Removing a web tag

·         Adding a new web tag category

·         Removing a web tag category

·         Modifying a web tag category

·         Adding a new web tag

·         Modifying a new web tag

These are the basic functionalities a web tag application should accomplish. Besides these, to facilitate the users' operation, all the functionalities are achieved within one web page using Ajax techniques. In this case, we have recurred to the script.aculo.us framework to achieve special page effects. During the course of accessing the page objects and event binding, we have fully leveraged the support of the Prototype framework, such as the event mechanism, CSS selector, etc.

With the general goals in mind, let us next shift our attention to the database design.