ajax

gistfile1.txt

ajax原理

ajax对象

open()打开  open(method,url,true)   the url -- a file on a server.
onreadystatechange
send()

GET方法在open()时即可发送信息体
e.g.
xmlhttp.open("GET","demo_get2.asp?fname=Henry&lname=Ford",true);

而POST方法则是在send()方法中
e.g.
xmlhttp.open("POST","ajax_test.asp",true);
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlhttp.send("fname=Henry&lname=Ford");

参考URL：http://www.w3schools.com/ajax/ajax_xmlhttprequest_send.asp