With the Ajax study for a period of time, from the initial escape from, and the last, and then to the actual realization of hands, more and more awareness, more and more ideas.    Particularly those who have a period went on web2.0, understands the great behind Ajax, secretly for joy, has become increasingly optimistic about Web. 

  But Ajax is in my mind how some also could not escape the shadow. 

  Mandrax as spring night, Ajax so on the very awkward to suddenly pop up.    Web2.0 also popular at the same time, these terms are now very dynamic drum, any thing, as long as the two due to the edge, it becomes very mysterious, not containment. 

  But others say Ajax is gimmicks, because he is old wine in a new bottle. 

  In fact, Ajax was popular, because it old wine in a new bottle.    Ajax by three representatives of the concept of asynchronous, Javascript, XML, it should be said that is not something new. 

  Asynchronous?    In the operating system, we have already learned, then the name is multi-threaded. 

  Javascript?    Looking back at the DHTML he had Gongbian River North and the South. 

  XML?    Look at those terms, SOAP, RSS, WAP, which left these terms had XML? 

  The reason why these terms have a powerful combination of strength, it is their designs, and hidden in different thinking behind the design. 

  The reason why these terms can be hot, because their applications have been very common, have stretched into every corner of the world. 

  Even Ajax in a little fresh point of XMLHttpRequest, before it is not substitute for it.    IFrame times we have achieved the same function, only XMLHttpRequest can be better than we have done to help us to do it more. 

  Javascript is Ajax technology blends together all of the mount.    The so-called Ajax application is actually running on a client browser environment applications.    The application procedure html DOM operation will be the Display of information to the user through the mechanism of events corresponding user operation, communicate with the server through XMLHttpRequest, the use of the agreement is HTTP, XML is the carrier of data, and this application is posed by Javascript. 

  Javascript is a very powerful language other words terms, is the common language (general language).    Javascript there are many convenient and powerful features, and has enabled us to develop a feature-rich products.    However Javascript is the script, or script, which he did not always escape a fate. 

  Scripts have a lot of problems, such as not stringent enough in itself, the characteristics of the slow implementation, and so on, here only talk about code reusability problems. 

  When applications increasingly complex, increasingly code for a long time, code reusability will become very important.    The lowest level of code reusability is the source code level code reusability, flexibility, but costs are high.    More advanced platforms, such as java and. Net have provided a more advanced code reusability, middle-class code, and even object code level.    Even in the. Net platform, according to Microsoft's great idea of the code in different languages can be unified, together running.    One can imagine that this will be. Net platform brings much fighting power.    Different languages, different platform code can be here display fist.    Integration is now the main theme,. Net a better future (in accordance with the scenario). 

  By contrast, as the script Javascript many gaps in this area will be.    In our application before the small, no one will care.    However, when we realized a lot of Ajax applications, as we gradually enrich our client, we will find the Yingshang Javascript, which is the script Yingshang.    Of course, we can transform Javascript, let him meet our needs, but at the time, you will suddenly discover, Javascript (if at that time also called it the name) is no longer a script. 

  In other words, the characteristics of the script is flexible, so it is to deal with some flexibility, but the development of low-cost situation.    And the traditional language more stringent procedures, development costs are high, but his operation and maintenance costs will be lower. 

  So, when we are aware that behind Ajax is a client of capacity, server-side function corresponding to the transfer of the client, we will have to re-look at Javascript in which the embarrassing position.    Javascript is in Ajax applications such photo subject, it lies in its flexibility.    Javascript flexible access to the public favorite, gradually became a standard.    Ajax Javascript can be used to rapidly applications, as today's darling.    Conversely, officially because of the flexibility Javascript, it is doomed decided not large, determines Ajax can not be optimistic about the future.    (If he still relies on Javascript, also called Ajax, and not AC (#) ax it.) 

  Ajax look at the competitors behind, the flash micromedia, the java web start, even. Net he may become a powerful enemy.    Microsoft publicize its next-generation operating system, referred to the focus of his performance.    Imagine, when all the IE support of the performance of the latest Microsoft technologies, who with Javascript?    Who use Ajax? 

  But even Ajax collapsed, but it does not matter, which itself is a transitional technology.    However, Ajax need to do is give us brainwashing: 

  Ajax tells us that attention to the script because they flexibility. 

  Ajax tells us that attention to users, because they pay. 

  Ajax told us to cross, because the software is service. 

  Ajax tells us that attention to the Web, because of convenience more than anything. 

  Ajax tells us that won goggles, Huanchongfangshi Thinking issues now.    When you back off the face ignore the changes in the world, is the world abandoned you, rather than you think it is self-deceiving.