JS校验银行卡号

【JS校验银行卡号】转载自cnblogs

//银行卡号码检测 function luhnCheck(bankno) { var lastNum = bankno.substr(bankno.length - 1, 1); //取出最后一位(与luhn进行比较) var first15Num = bankno.substr(0, bankno.length - 1); //前15或18位 var newArr = new Array(); for (var i = first15Num.length - 1; i > -1; i--) { //前15或18位倒序存进数组 newArr.push(first15Num.substr(i, 1)); } var arrJiShu = new Array(); //奇数位*2的积 <9 var arrJiShu2 = new Array(); //奇数位*2的积 >9 var arrOuShu = new Array(); //偶数位数组 for (var j = 0; j < newArr.length; j++) { if ((j + 1) % 2 == 1) { //奇数位 if (parseInt(newArr[j]) * 2 < 9) arrJiShu.push(parseInt(newArr[j]) * 2); else arrJiShu2.push(parseInt(newArr[j]) * 2); } else //偶数位 arrOuShu.push(newArr[j]); }var jishu_child1 = new Array(); //奇数位*2 >9 的分割之后的数组个位数 var jishu_child2 = new Array(); //奇数位*2 >9 的分割之后的数组十位数 for (var h = 0; h < arrJiShu2.length; h++) { jishu_child1.push(parseInt(arrJiShu2[h]) % 10); jishu_child2.push(parseInt(arrJiShu2[h]) / 10); }var sumJiShu = 0; //奇数位*2 < 9 的数组之和 var sumOuShu = 0; //偶数位数组之和 var sumJiShuChild1 = 0; //奇数位*2 >9 的分割之后的数组个位数之和 var sumJiShuChild2 = 0; //奇数位*2 >9 的分割之后的数组十位数之和 var sumTotal = 0; for (var m = 0; m < arrJiShu.length; m++) { sumJiShu = sumJiShu + parseInt(arrJiShu[m]); }for (var n = 0; n < arrOuShu.length; n++) { sumOuShu = sumOuShu + parseInt(arrOuShu[n]); }for (var p = 0; p < jishu_child1.length; p++) { sumJiShuChild1 = sumJiShuChild1 + parseInt(jishu_child1[p]); sumJiShuChild2 = sumJiShuChild2 + parseInt(jishu_child2[p]); } //计算总和 sumTotal = parseInt(sumJiShu) + parseInt(sumOuShu) + parseInt(sumJiShuChild1) + parseInt(sumJiShuChild2); //计算luhn值 var k = parseInt(sumTotal) % 10 == 0 ? 10 : parseInt(sumTotal) % 10; var luhn = 10 - k; if (lastNum == luhn) { $("#banknoInfo").html("luhn验证通过"); return true; } else { $("#banknoInfo").html("银行卡号必须符合luhn校验"); return false; } }

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