二維碼生成 并顯示：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="ko" lang="ko"><head><title>Javascript 二維碼生成庫：QRCode</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><meta name="viewport" content="width=device-width,initial-scale=1,user-scalable=no" /><!-- 自己從網上找對應的文件或者應用一下文件源碼 --><script type="text/javascript" src="query.js"></script><script type="text/javascript" src="qrcode.js"></script></head><body><input id="text" type="text" style="width:80%" /><br /><div id="qrcode" style="width:100px; height:100px; margin-top:15px;"></div><script type="text/javascript">var qrcode = new QRCode(document.getElementById("qrcode"), {width: 100,height: 100});function makeCode() {var elText = document.getElementById("text");if (!elText.value) {// alert("Input a text");elText.focus();return;}qrcode.makeCode(elText.value);}makeCode();$("#text").on("blur", function() {makeCode();}).on("keydown", function(e) {if (e.keyCode == 13) {makeCode();}});</script></body>
</html>
