JavaScript动态生成二维码图片

<div id="qrcode" style="width:200px; height:200px;position: fixed;bottom: 40%; right: 20%;"></div>

<script src="QRCode.js"></script>

var qrcode = new QRCode(document.getElementById("qrcode"), {
width : 200,
height : 200
}); 
var token='params';
var QRCodeUrl='http:\\.baidu.'+'/Share/ScanQRCode?token='+token;
qrcode.makeCode(QRCodeUrl);