Ajax represents Asynchronous JavaScript and XML (Asynchronous JavaScript and XML), a term which is a mix of some of the interactive technologies (JavaScript, Web browser and a Web server), which allows us to acquire and display new content without having to load a the new Web page. Enhance the user experience, feeling more desktop applications.
What Ajax can do?
The new display HTML content without having to load the entire page
Submit a form and display the results immediately
Login instead jump to a new page
Star Rating Component
Traversing the database information without refreshing the page to load more ......
1. ajax request transmitting step of:
1, create XMLHttpRequest object
2, ready to send
3, performs the transmission operation
4, specify a callback function
2. Method Request
get
get request parameters passed in the url
Note that coding problems
post
post request parameter passed in the request body
Header information setting request requires