<script>
function loaded()
{
    setTimeout("history.go(-1)", 0);
}
</script>
<body onload="loaded();">This page should go back to the previous page.</body>
<script>
if (history.length == 0) {
    document.innerHTML += "<br> But it won't work because there is no back history!";
    if (window.testRunner)
        testRunner.notifyDone();
}
</script>