根据身份证自动识别生日、性别

//1、定义一个全国地区的对象

        var aCity={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"}

        //2、正则表达式判断

        function isCardID(sId){

            var iSum=0 ;

            var info="" ;

            if(!/^\d{17}(\d|x)$/i.test(sId)) return "你输入的身份证长度或格式错误";

            sId=sId.replace(/x$/i,"a");

            if(aCity[parseInt(sId.substr(0,2))]==null) return "你的身份证地区非法";

            sBirthday=sId.substr(6,4)+"-"+Number(sId.substr(10,2))+"-"+Number(sId.substr(12,2));

            var d=new Date(sBirthday.replace(/-/g,"/")) ;

         if(sBirthday!=(d.getFullYear()+"-"+ (d.getMonth()+1) + "-" + d.getDate()))   return "身份证上的出生日期非法";

      for(var i = 17;i>=0;i --) iSum += (Math.pow(2,i) % 11) * parseInt(sId.charAt(17 - i),11) ;

            if(iSum%11!=1) return "你输入的身份证号非法";

       sSex =(sId.substr(16,1)%2?"男":"女");//此次还可以判断出输入的身份证号的人性别

            acity[parseInt]

            return true;

        }

        $("#验证的ID").change(function () {

            //获取身份证

            var sId = $("#验证的ID").val();

           layer.alert(isCardID(sId));

        });