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<div id="qrcode"></div>
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<script type="text/javascript">
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new QRCode(document.getElementById("qrcode"), "http://jindo.dev.naver.com/collie");
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</script>

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<div id="qrcode"></div>
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<script type="text/javascript">
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var qrcode = new QRCode(document.getElementById("qrcode"), {
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  text: "http://jindo.dev.naver.com/collie",
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  width: 128,
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  height: 128,
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  colorDark : "#000000",
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  colorLight : "#ffffff",
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  correctLevel : QRCode.CorrectLevel.H
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});
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</script>

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qrcode.clear(); // 清除二维码.
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qrcode.makeCode("http://naver.com"); // 重新生成其他二维码.