基于javascript简单实现对身份证校验

本文实例介绍了javascript简单实现对身份证的校验的关键性代码，分享给大家供大家参考，具体内容如下

checkCard = function(card)
{

//是否为空
if(card === '')
{

return "请输入身份证号，身份证号不能为空";
}
//校验长度，类型
if(isCardNo(card) === false)
{

return "您输入的身份证号码不正确，请重新输入";
}
//检查省份
if(checkProvince(card) === false)
{
return "您输入的身份证号码不正确,请重新输入";
}
//校验生日
if(checkBirthday(card) === false)
{
return "您输入的身份证号码生日不正确,请重新输入";
}
//检验位的检测
if(checkParity(card) === false)
{
return "您的身份证校验位不正确,请重新输入";
}

return "ok";
};

//检查号码是否符合规范，包括长度，类型
isCardNo = function(card)
{
//身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X
var reg = /(^\d{15}$)|(^\d{17}(\d|X)$)/;
if(reg.test(card) === false)
{
return false;
}

return true;
};

//取身份证前两位,校验省份
checkProvince = function(card)
{
var province = card.substr(0,2);
if(vcity[province] == undefined)
{
return false;
}
return true;
};

//检查生日是否正确
checkBirthday = function(card)
{
var len = card.length;
//身份证15位时，次序为省（3位）市（3位）年（2位）月（2位）日（2位）校验位（3位），皆为数字
if(len == '15')
{
var re_fifteen = /^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/;
var arr_data = card.match(re_fifteen);
var year = arr_data[2];
var month = arr_data[3];
var day = arr_data[4];
var birthday = new Date('19'+year+'/'+month+'/'+day);
return verifyBirthday('19'+year,month,day,birthday);
}
//身份证18位时，次序为省（3位）市（3位）年（4位）月（2位）日（2位）校验位（4位），校验位末尾可能为X
if(len == '18')
{
var re_eighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/;
var arr_data = card.match(re_eighteen);
var year = arr_data[2];
var month = arr_data[3];
var day = arr_data[4];
var birthday = new Date(year+'/'+month+'/'+day);
return verifyBirthday(year,birthday);
}
return false;
};

//校验日期
verifyBirthday = function(year,birthday)
{
var now = new Date();
var now_year = now.getFullYear();
//年月日是否合理
if(birthday.getFullYear() == year && (birthday.getMonth() + 1) == month && birthday.getDate() == day)
{
//判断年份的范围（3岁到100岁之间)
var time = now_year - year;
if(time >= 3 && time <= 100)
{
return true;
}
return false;
}
return false;
};

//校验位的检测
checkParity = function(card)
{
//15位转18位
card = changeFivteenToEighteen(card);
var len = card.length;
if(len == '18')
{
var arrInt = new Array(7,9,10,5,8,4,2,1,6,3,7,2);
var arrCh = new Array('1','0','X','9','8','7','6','5','4','3','2');
var cardTemp = 0,i,valnum;
for(i = 0; i < 17; i ++)
{
cardTemp += card.substr(i,1) * arrInt[i];
}
valnum = arrCh[cardTemp % 11];
if (valnum == card.substr(17,1))
{
return true;
}
return false;
}
return false;
};

//15位转18位身份证号
changeFivteenToEighteen = function(card)
{
if(card.length == '15')
{
var arrInt = new Array(7,i;
card = card.substr(0,6) + '19' + card.substr(6,card.length - 6);
for(i = 0; i < 17; i ++)
{
cardTemp += card.substr(i,1) * arrInt[i];
}
card += arrCh[cardTemp % 11];
return card;
}
return card;
};

以上就是本文的全部内容，希望对大家实现javascript身份证校验有所帮助。