Using jquery to realize the linkage _jquery of multi-level dropdown box without refreshing

First ready to use. NET only with the AJAX implementation, found not to achieve the desired effect. Later, the Ajax feature in jquery was used to invoke the Web service implementation written by C # asynchronously.

The load () method can be said to be the simplest Ajax method in jquery, which is used to get the response of the target server and display the results on the page. The Load method is jquery's wrapper over Ajax. You can also use $.post () and $.get () to implement Ajax calls for post or get methods, and for complex situations, you can use the Ajax () method.