帮我改一段代码 不用jquery： $#qrcodeqrcodewidth180height180texthttpsqralipaycombax04981uulaql98wrh200db; setTimeoutstop 300000; function stop clearIntervalpaid_timeout; var paid_timeout = se

以下是不使用jQuery的修改后的代码：

var qrcode = document.createElement("div"); qrcode.id = "qrcode"; document.body.appendChild(qrcode);

var qrcodeConfig = { width: 180, height: 180, text: "https://qr.alipay.com/bax04981uulaql98wrh200db" }; generateQRCode(qrcodeConfig);

setTimeout(stop, 300000);

function stop() { clearInterval(paid_timeout); }

var paid_timeout = setInterval(go, 3000);

function go() { var xhr = new XMLHttpRequest(); xhr.open('GET', window.location.href); xhr.onload = function() { if (xhr.status === 200) { var data = xhr.responseText; if (data.search(/<span\sclass=.paid.>/) !== -1) { clearInterval(paid_timeout); alert("支付完成"); window.location.href = "/cart.php?a=complete"; } } }; xhr.send(); }

function generateQRCode(config) { var qrcode = document.getElementById("qrcode"); var qrCodeInstance = new QRCode(qrcode, config); }