<script type="text/javascript">
picture1 = new Image;
picture1.src = "picture/loading.jpg";
picture2 = new Image;
picture2.src = "picture/loader.jpg";
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<a href="page5.html" onmouseover="document.picture2.src=picture2.src"
onmouseout="document.picture1.src=picture1.src">
<img name="picture" src="picture/loading.jpg" alt="image" />
</a>
</div>
</form>
</body>
this is my code when i debug this it showing:
Mi开发者_开发知识库crosoft JScript runtime error: 'document.picture2' is null or not an object
But i already assign value to the 'document.picture2'
The global object is window not document. Therefore you may want to use window.picture2.src instead of document.picture2.src.
In addition, you should probably give a unique id to your elements and reference them using document.getElementById():
<img id="picture1" src="picture/loading.jpg" alt="image" />
...is referenced using:
document.getElementById('picture1');
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
加载中,请稍侯......
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