js 身份證驗證 （非正則）

身份證驗證 涉及到每一位數的驗證以及後四位需要計算，所以一般的正則無法滿足

checkidcard(num) $)|(^\d([0-9]|x)$)/.test(num))) 

//校驗位按照iso 7064:1983.mod 11-2的規定生成，x可以認為是數字10。 
//下面分別分析出生日期和校驗位 
var len, re;
len = num.length;
if (len == 15) )(\d)(\d)(\d)(\d)$/);
var arrsplit = num.match(re);
//檢查生日日期是否正確 
var dtmbirth = new date('19' + arrsplit[2] + '/' + arrsplit[3] + '/' + arrsplit[4]);
var bcorrectday;
bcorrectday = (dtmbirth.getyear() == number(arrsplit[2])) && ((dtmbirth.getmonth() + 1) == number(arrsplit[3])) &&
(dtmbirth.getdate() == number(arrsplit[4]));
if (!bcorrectday) else 
num += arrch[ntemp % 11];
return true;}}
if (len == 18) )(\d)(\d)(\d)(\d)([0-9]|x)$/);
var arrsplit = num.match(re);
//檢查生日日期是否正確 
var dtmbirth = new date(arrsplit[2] + "/" + arrsplit[3] + "/" + arrsplit[4]);
var bcorrectday;
bcorrectday = (dtmbirth.getfullyear() == number(arrsplit[2])) && ((dtmbirth.getmonth() + 1) == number(arrsplit[3])) &&
(dtmbirth.getdate() == number(arrsplit[4]));
if (!bcorrectday) else 
valnum = arrch[ntemp % 11];
if (valnum != num.substr(17, 1)) 
return true;}}
return false;
}

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