<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>HTML5学堂</title>
</head>
<body>
<div id="h5course" class="h5course-cn">学习HTML5，到HTML5学堂-h5course-com</div>
<img id="majiang" src="majiang.png" alt="码匠" />
<script src="jquery-1.11.3.min.js" type="text/javascript"></script>
<script type="text/javascript">
var h5course = document.getElementById('majiang');
// 修改图片路径
h5course.src = 'h5course-com.png';
</script>
</body>
</html>