在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(cainiaoplay.com)</title>
</head>
<body>

<img id="compman" src="compman.gif.html" lowsrc="compman_lowres.gif" alt="Computerman" width="107" height="98">
<br>
<script>
var x=document.getElementById("compman");
document.write('<a href="' + x.lowsrc + '">低分辨率</a>');
</script>

</body>
</html>

源代码

动行结果