//身份证省的编码
var vcity={ 11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",
        21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",
        33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",
        42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",
        51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃",
        63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"
       };

//检查号码是否符合规范，包括长度，类型
function isCardNo(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){
  //alert("demo");
  return false;
 }
 return true;
}

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

//检查生日是否正确
function checkBirthday(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,month,day,birthday);
 }
 return false;
}

//校验日期
function verifyBirthday(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
function checkParity(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, 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位转18位身份证号
function changeFivteenToEighteen(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;
}


function checkPhone(phone) {
    return (/^1[3|4|5|7|8]\d{9}$/.test(phone));
}
//验证邮箱格式
function isEmail()
{
    var email=document.getElementById("email").value;
    if(email=="")
    {
        //alert("请输入邮箱！");
        document.getElementById("checkmail").style.color="red";
        document.getElementById("checkmail").innerHTML="✘请输入邮箱";

        return false;
    }
    var pattern= /^([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,3}$/;
    strEmail=pattern.test(email);
    if (strEmail)
    {
        document.getElementById("checkmail").style.color="green";//设置邮箱可用是的字体颜色
        document.getElementById("checkmail").innerHTML="✔";

        return true;
    }
    else
    {
        document.getElementById("checkmail").style.color="red";//设置邮箱不可用时的字体颜色
        document.getElementById("checkmail").innerHTML="✘请输入正确的邮箱";

    }
}
//验证用户名
function isUsername(){
    var username=document.getElementById("username").value;
    if(username=="")
    {
        document.getElementById("checkname").style.color="red";
        document.getElementById("checkname").innerHTML="✘请输入昵称";
        return false;
    }
    var length=strlen(username);

    if (length > 3) {
        document.getElementById("checkname").style.color="green";//设置邮箱可用是的字体颜色
        document.getElementById("checkname").innerHTML="✔";


    } else
    {
        document.getElementById("checkname").style.color="red";
        document.getElementById("checkname").innerHTML="大于2个汉字，4个字符";

    }

}
//验证密码
function isPassword(){
    var password=document.getElementById("password").value;
    if(password=="")
    {
        document.getElementById("checkpass").style.color="red";
        document.getElementById("checkpass").innerHTML="✘请输入密码";
        return false;
    }
    var pattern=/^s*[.A-Za-z0-9_-]{6,16}s*$/
    strpass=pattern.test(password);

    if (strpass) {
        document.getElementById("checkpass").style.color="green";//设置邮箱可用是的字体颜色
        document.getElementById("checkpass").innerHTML="✔";

        return true;
    } else
    {
        document.getElementById("checkpass").style.color="red";
        document.getElementById("checkpass").innerHTML="✘密码6~16位";

    }

}
function strlen(str){
    var len = 0;
    for (var i=0; i<str.length; i++) {
        var c = str.charCodeAt(i);
        //单字节加1
        if ((c >= 0x0001 && c <= 0x007e) || (0xff60<=c && c<=0xff9f)) {
            len++;
        }
        else {
            len+=2;
        }
    }
    return len;
}