<html>
<body>
<head>
<script>
function changeImage()
{
var element=document.getElementById(‘myimage‘);
element.src="1.jpg";
}
</script>
</head>
<h1>This is Page1</h1>
<p>This is some text.</p>
<img id="myimage" src="" style="width:100px;height:100px/>
<input name="jfal" type=‘button‘ onclick="changeImage()">
</body>
</html>
原文：http://www.cnblogs.com/zhangdashuai/p/4126764.html