1.根據id來選擇, $('#idA') 選擇全部id爲idA的元素,忽略元素標籤, $('div#idA')選擇全部的id爲idA的div. javascript
2.$('.classA')不考慮標籤選擇全部的class中有classA的元素。$('div.classA')選擇全部的class中包含classA的div元素。 html
<html> <head> <title>jQuery Get element with class name and id</title> <script type="text/javascript" src="jquery-1.10.2.js"></script> </head> <script type="text/javascript"> $(document).ready(function(){ var $element = $('.classABC').html(); alert($element); var $element = $('#idABC').html(); alert($element); }); </script> <body> <h1>jQuery Get element with class name and id</h1> <div class="classABC"> This is belong to 'div class="classABC"' </div> <div id="idABC"> This is belong to 'div id="idABC"' </div> </body> </html>