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26 lines
388 B
HTML
26 lines
388 B
HTML
<!DOCTYPE html>
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<html>
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<head>
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<script type="text/javascript">
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function boom()
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{
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window.addEventListener("DOMSubtreeModified", function(){}, false);
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var span = document.createElement("span");
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document.body.appendChild(span);
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}
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</script>
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<style type="text/css">
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span:before { content: '0'; }
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span:after { content: '1'; }
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</style>
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</head>
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<body onload="boom();"></body>
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</html>
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