Anderson

<html>
<head>
<script type="text/javascript">
cc=0;
function changeimage()
{
if (cc==0)
{
cc=1;
document.getElementById('myimage').src="black.png"
}
else
{
cc=0;
document.getElementById('myimage').src="blank.png"
}
}
</script>
</head>

<body>

<img id="myimage" onclick="changeimage()" border="0" src="black.png" width="272" height="231" />
<p>Clique para mudar a imagem</p>

</body>
</html>