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//通過class屬性值匹配元素
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>.class選擇器</title> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /> <style type="text/css"> .class1{color:red;} </style> <script type="text/javascript" src="jquery-1.7.1.min.js"></script> <script type="text/javascript"> window.onload=function(){ document.getElementById('btnOk').onclick=function(){ $(' .class1 ').html('php'); //把使用.class1的元素匹配並內容替換 }; }; </script> </head> <body> <div id="div1">div1</div> <hr/> <div class="class1">div2</div> <hr/> <p class="class1">楊</p> <input type="button" id='btnOk' value='確定' /> </body> </html>
