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JavaScript隨機生成信用卡卡號的方法
這段JS代碼根據信用卡卡號產生規則隨機生成信用卡卡號，是可以通過驗證的，僅供學習參考，請不要用於非法用途，否則後果自負。
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 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 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 var visaPrefixList = new Array( "4539", "4556", "4916", "4532", "4929", "40240071", "4485", "4716", "4" ); var mastercardPrefixList = new Array( "51", "52", "53", "54", "55" ); var amexPrefixList = new Array( "34", "37" ); var discoverPrefixList = new Array("6011"); var dinersPrefixList = new Array( "300", "301", "302", "303", "36", "38" ); var enRoutePrefixList = new Array( "2014", "2149" ); var jcbPrefixList = new Array( "35" ); var voyagerPrefixList = new Array("8699"); function strrev(str) { if (!str) return ''; var revstr=''; for (i = str.length-1; i>=0; i--) revstr+=str.charAt(i) return revstr; } /* 'prefix' is the start of the CC number as a string, any number of digits. 'length' is the length of the CC number to generate. Typically 13 or 16 */ function completed_number(prefix, length) { var ccnumber = prefix; // generate digits while ( ccnumber.length < (length - 1) ) { ccnumber += Math.floor(Math.random()*10); } // reverse number and convert to int var reversedCCnumberString = strrev( ccnumber ); var reversedCCnumber = new Array(); for ( var i=0; i < reversedCCnumberString.length; i++ ) { reversedCCnumber[i] = parseInt(reversedCCnumberString.charAt(i)); } // calculate sum var sum = 0; var pos = 0; while ( pos < length - 1 ) { odd = reversedCCnumber[ pos ] * 2; if ( odd > 9 ) { odd -= 9; } sum += odd; if ( pos != (length - 2) ) { sum += reversedCCnumber[ pos +1 ]; } pos += 2; } // calculate check digit var checkdigit = ((Math.floor(sum/10)+1)*10-sum)%10; ccnumber += checkdigit; return ccnumber; } function credit_card_number(prefixList, length, howMany) { var result = new Array(); for (var i = 0; i < howMany; i++) { var randomArrayIndex = Math.floor(Math.random() * prefixList.length); var ccnumber = prefixList[ randomArrayIndex ]; result.push( completed_number(ccnumber, length) ); } return result; }調用方法：
將上面的代碼保存為gencc.js文件
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 <html> <head> <script src="gencc.js" type="text/javascript"></script> </head> <body> <h3>VISA:</h3> <script> var visa = credit_card_number(visaPrefixList, 16, 3); document.write( visa ); </script> <h3>Amex:</h3> <script> var amex = credit_card_number(amexPrefixList, 15, 3); document.write( amex ); </script> </body> </html>javascript排行
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