<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>点亮灯泡</title>
</head>
<body>
<img id="myimage" src="img/pic_bulboff.gif" οnclick="changeImage()" alt="my image gallery">
<p>点击灯泡就可以打开或关闭这盏灯</p>
<script>
function changeImage() {
element = document.getElementById('myimage')
if (element.src.match("bulbon")) {
element.src = "img/pic_bulboff.gif";
} else {
element.src = "img/pic_bulbon.gif";
}
}
</script>
</body>
</html>
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