//银行卡号码检测规范

//验证银行卡号规范

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: any = 0; //奇数位*2 < 9 的数组之和

var sumOuShu: any = 0; //偶数位数组之和

var sumJiShuChild1: any = 0; //奇数位*2 >9 的分割之后的数组个位数之和

var sumJiShuChild2: any = 0; //奇数位*2 >9 的分割之后的数组十位数之和

var sumTotal: any = 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) {

return true;

} else {

return false;

}

}