<!DOCTYPE html>
<html>
<head>
<title>js开关灯</title>
</head>
<body>
<img id="lamp" onClick="changeImage()" src="images/on.gif">
<p>点击图片关灯或开灯</p>
<script>
function changeImage()
{
var element=document.getElementById("lamp");
if(element.src.match("on.gif"))
element.src="images/off.gif";
else
element.src="images/on.gif";
}
</script>
</div>
</body>
</html>
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