jQuery与Ajax的应用
XMLHttpRequest对象 XHR
Ajax核心XMLHttpRequest对象:
xhr.open("get/post","example.txt",false);
xhr.send(null);
http://dev.yesky.com/91/2687091.shtml
jQuery对Ajax进行了封装:
$.load();
$.get()和$.post();
$.getScript()和$.getJSON();
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