Implementation Technologies Of Object Based On Embedded JavaScript

Because of the rapid development in the multimedia technology and network, embedded system has entered a new stage. With strong network function and good information interface, embedded browser has become one of the most application software in embedded system. Since the browser only for static Web has not met the requirements, and JavaScript can realize a kind of dynamic and mutual ability, it becomes the trend for the embedded browsers to support JavaScript.JavaScript is a kind of language based on object. Because the interaction is mainly implemented by triggering events of JavaScript object, how to implement object organization, object operation and object events is important for JavaScript interpret system.Object organization is fundamental for object implementing technology. According to the effective range of object, it is stored in the corresponding context. To access global objects with high efficiency, HASH table is used to store such kind of objects. Since it is quite different for user defined object, browser object and embedded object, different structures are designed to store them.JavaScript expression can be divided into three categories: function callback, the basic calculation and object operation. On the base of traditional operator procedure algorithm, an improved object-based operator procedure algorithm with the extension of operator is presented in order to deal with all kinds of expression, including the design of object method calling interface called by the function handler engine. Then the object operation is wrapped.Event drive is the key for interaction and dynamic ability of Web. According to characters of different object events, structures for event description are designed, and how to handle different events is presented. The interaction between JavaScript interpreter system and browser can be divided into two categories. The second interaction is introduced prominently.