var vcity={ 11:"北京",12:"天津",13:"河北",14:"山西",15:"內(nèi)蒙古", 
21:"遼寧",22:"吉林",23:"黑龍江",31:"上海",32:"江蘇", 
33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山東",41:"河南", 
42:"湖北",43:"湖南",44:"廣東",45:"廣西",46:"海南",50:"重慶", 
51:"四川",52:"貴州",53:"云南",54:"西藏",61:"陜西",62:"甘肅", 
63:"青海",64:"寧夏",65:"新疆",71:"臺灣",81:"香港",82:"澳門",91:"國外" 
}; 

checkCard = function(card) 
{ 

//是否為空 
if(card === '') 
{ 

return "請輸入身份證號，身份證號不能為空"; 
} 
//校驗長度，類型 
if(isCardNo(card) === false) 
{ 

return "您輸入的身份證號碼不正確，請重新輸入"; 
} 
//檢查省份 
if(checkProvince(card) === false) 
{ 
return "您輸入的身份證號碼不正確,請重新輸入"; 
} 
//校驗生日 
if(checkBirthday(card) === false) 
{ 
return "您輸入的身份證號碼生日不正確,請重新輸入"; 
} 
//檢驗位的檢測 
if(checkParity(card) === false) 
{ 
return "您的身份證校驗位不正確,請重新輸入"; 
} 

return "ok"; 
}; 


//檢查號碼是否符合規(guī)范，包括長度，類型 
isCardNo = function(card) 
{ 
//身份證號碼為15位或者18位，15位時全為數(shù)字，18位前17位為數(shù)字，最后一位是校驗位，可能為數(shù)字或字符X 
var reg = /(^\d{15}$)|(^\d{17}(\d|X)$)/; 
if(reg.test(card) === false) 
{ 
return false; 
} 

return true; 
}; 

//取身份證前兩位,校驗省份 
checkProvince = function(card) 
{ 
var province = card.substr(0,2); 
if(vcity[province] == undefined) 
{ 
return false; 
} 
return true; 
}; 

//檢查生日是否正確 
checkBirthday = function(card) 
{ 
var len = card.length; 
//身份證15位時，次序為省（3位）市（3位）年（2位）月（2位）日（2位）校驗位（3位），皆為數(shù)字 
if(len == '15') 
{ 
var re_fifteen = /^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/; 
var arr_data = card.match(re_fifteen); 
var year = arr_data[2]; 
var month = arr_data[3]; 
var day = arr_data[4]; 
var birthday = new Date('19'+year+'/'+month+'/'+day); 
return verifyBirthday('19'+year,month,day,birthday); 
} 
//身份證18位時，次序為?。?位）市（3位）年（4位）月（2位）日（2位）校驗位（4位），校驗位末尾可能為X 
if(len == '18') 
{ 
var re_eighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/; 
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,month,day,birthday); 
} 
return false; 
}; 

//校驗日期 
verifyBirthday = function(year,month,day,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) 
{ 
//判斷年份的范圍（3歲到100歲之間) 
var time = now_year - year; 
if(time >= 3 && time <= 100) 
{ 
return true; 
} 
return false; 
} 
return false; 
}; 

//校驗位的檢測 
checkParity = function(card) 
{ 
//15位轉(zhuǎn)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, 9, 10, 5, 8, 4, 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位轉(zhuǎn)18位身份證號 
changeFivteenToEighteen = function(card) 
{ 
if(card.length == '15') 
{ 
var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2); 
var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'); 
var cardTemp = 0, 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; 
};