<html>
<head>
<script type="text/javascript">
flag=0;
function change()
{
if (flag==0){
flag=1;
document.getElementById('pic').src="venglobe.gif";
}
else{
flag=0;
document.getElementById('pic').src="planets.gif";
}
}
</script>
<title>This is my try about image map</title>
</head>
<body>
<img id="pic" onmouseover=change() src="planets.gif" alt="This is a map" /><br />
</body>
</html>