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<!DOCTYPE html>
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<html lang="en">
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<meta charset="utf-8">
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<title>Testcase for filters on canvas</title>
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<style>
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#checkbox {
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box-shadow: 0 0 0 5px blue;
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}
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</style>
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<input type="checkbox" id="checkbox">
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<script>
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document.getElementById("checkbox").focus();
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</script>
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