var keyStr="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";function encode64(a){var b="";var h,f,g;var j,i,d,e;var c=0;do{h=a.charCodeAt(c++);f=a.charCodeAt(c++);g=a.charCodeAt(c++);j=h>>2;i=((h&3)<<4)|(f>>4);d=((f&15)<<2)|(g>>6);e=g&63;if(isNaN(f)){d=e=64}else if(isNaN(g)){e=64}b=b+keyStr.charAt(j)+keyStr.charAt(i)+keyStr.charAt(d)+keyStr.charAt(e)}while(c<a.length);return b}function decode64(a){var b="";var h,f,g;var j,i,d,e;var c=0;a=a.replace(/[^A-Za-z0-9\+\/\=]/g,"");do{j=keyStr.indexOf(a.charAt(c++));i=keyStr.indexOf(a.charAt(c++));d=keyStr.indexOf(a.charAt(c++));e=keyStr.indexOf(a.charAt(c++));h=(j<<2)|(i>>4);f=((i&15)<<4)|(d>>2);g=((d&3)<<6)|e;b=b+String.fromCharCode(h);if(d!=64){b=b+String.fromCharCode(f)}if(e!=64){b=b+String.fromCharCode(g)}}while(c<a.length);return b}