jQuery - Introduction

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What is jQuery?

jQuery is a library, or set of helpful add-ons, to the JavaScript programming language. 

$(document).ready(function()) {
  Do something;  
};

$(document)  is a jQuery object. 

.ready() is a type of function.

function(){} is the action that .ready() will perform as soon as the HTML document is loaded.

学习资源:

http://learn.jquery.com/

jQuery - Introduction

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原文地址：http://www.cnblogs.com/elewei/p/5657347.html