如何验证用户输入的身份证号码是否有效?
网上大部分验证方法都只是对身份证号码的格式做了简单的验证,对于身份证的有效性并未做验证,以下这个函数可以验证身份证号码的有效性,支持末尾是X的身份证号码验证
function IdCardValidate(idCard){
var Wi = [ 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1 ];// 加权因子
var ValideCode = [ 1, 0, 10, 9, 8, 7, 6, 5, 4, 3, 2 ]; // 身份证验证位值.10代表X
var sum = 0;
var isValidityBrith = function(year,month,day){
var temp_date = new Date(year,parseFloat(month)-1,parseFloat(day));
if(year.length == 2){
var temp_year = temp_date.getYear();
}else if(year.length == 4){
var temp_year = temp_date.getFullYear();
}else{
return false;
}
if(temp_year != parseFloat(year)
|| temp_date.getMonth() != parseFloat(month) - 1
|| temp_date.getDate() != parseFloat(day)){
return false;
}else{
return true;
}
}
idCard = idCard.replace(/ /g, "").replace(/(^\s*)|(\s*$)/g, "");
if(idCard.length == 15){
var year = idCard.substring(6,8);
var month = idCard.substring(8,10);
var day = idCard.substring(10,12);
return isValidityBrith(year,month,day);
}
if(idCard.length != 18) return false;
var a_idCard = idCard.split("");
if (a_idCard[17].toLowerCase() == 'x') a_idCard[17] = 10;
for ( var i = 0; i < 17; i++) {
sum += Wi[i] * a_idCard[i];
}
valCodePosition = sum % 11; // 得到验证码所在位置
if (a_idCard[17] != ValideCode[valCodePosition]) return false;
var year = idCard.substring(6,10);
var month = idCard.substring(10,12);
var day = idCard.substring(12,14);
return isValidityBrith(year,month,day);
}