<html>
<head>
<script>
nopic = 1;
function checkpic() {
if (nopic) {
document.location = "noimage.html";
} else {
document.location = "yesimage.html";
}
}
</script>
</head>
<body onload="checkpic()">
<img src="i.gif" width="1" height="1" onload="nopic=0" onerror="nopic=0">
</body>
</html>