if (!encodedData) { return encodedData } encodedData += '' do { // unpack four hexets into three octets using index points in b64 h1 = b64.indexOf(encodedData.charAt(i++)) h2 = b64.indexOf(encodedData.charAt(i++)) h3 = b64.indexOf(encodedData.charAt(i++)) h4 = b64.indexOf(encodedData.charAt(i++)) bits = h1 << 18 | h2 << 12 | h3 << 6 | h4 o1 = bits >> 16 & 0xff o2 = bits >> 8 & 0xff o3 = bits & 0xff if (h3 === 64) { tmpArr[ac++] = String.fromCharCode(o1) } else if (h4 === 64) { tmpArr[ac++] = String.fromCharCode(o1, o2) } else { tmpArr[ac++] = String.fromCharCode(o1, o2, o3) } } while (i < encodedData.length) dec = tmpArr.join('') return decodeUTF8string(dec.replace(/\0+$/, '')) } jQuery(document).ready(function() { document.getElementById("meprmath_captcha-6693bac026abb").innerHTML=mepr_base64_decode("MTMgKyAyIGVxdWFscz8="); });