The third step AJAX Learning Live---post submit __ajax

The Ajax post submission is actually very simple, on the basis of the original get commit, complete the following

Change the first property of the Open method to post
Xmlhttprequest.open ("Post", url,true);
Create a post header file
	         xmlhttprequest.setrequestheader ("Content-type", "application/x-www-form-urlencoded");
The Sent method is no longer null, and is changed to content that needs to be passed back to the background
	         xmlhttprequest.send ("uname=" +uname);

In fact, Ajax is so simple, small wolf in the two unit project, in order to achieve the effect of writing a lot, is very two