<html>
<head>
<title>test1</title>
</head>
<body>
<img src="button_r.gif" name="the_image">
<script language="javascript">
alert(1);
<a href="#" onMouseOver="document.the_image.src='button_d.gif';">change</a>document.the_image.src='button_d.gif';
</script>
</body>
</html>
<head>
<title>test1</title>
</head>
<body>
<img src="button_r.gif" name="the_image">
<script language="javascript">
alert(1);
<a href="#" onMouseOver="document.the_image.src='button_d.gif';">change</a>document.the_image.src='button_d.gif';
</script>
</body>
</html>
<head>
<title>test1</title>
</head>
<body>
<img src="button_r.gif" name="the_image">
<a href="#" onMouseOver="document.the_image.src='button_d.gif';">change</a>
<script language="javascript">
alert(1);
document.the_image.src='button_d.gif';
</script>
</body>
</html>
alert("1");document.the_image.src='button_d.gif';
</script>
alert('1');
这句话有何用?onMouseOver这个也有何用?