JQuery 身份证号码效验

//为值添加0  
    function Append_zore(temp) {  
        if(temp<10)   
            return "0"+temp;  
        else   
            return temp;   
    }      

//身份证号码验证     
function validateDidentity(certNumber){  
    if(certNumber!="")  
    {     
        //身份证的地区代码对照  
        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" };           
        //获取证件号码  
        var person_id=certNumber;  
        //合法性验证  
        var sum = 0;  
        //出生日期  
        var birthday;  
        //验证长度与格式规范性的正则  
        var pattern=new RegExp(/(^\d{15}$)|(^\d{17}(\d|x|X)$)/i);         
        if (pattern.exec(person_id)) {  
            //验证身份证的合法性的正则  
            pattern=new RegExp(/^[1-9]\d{7}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{3}$/);  
            if(pattern.exec(person_id)) {     
                //获取15位证件号中的出生日期并转位正常日期       
                birthday = "19"+person_id.substring(6,8)+"-"+person_id.substring(8,10)+
                           "-"+person_id.substring(10,12);            
            }                 
            else   
            {     
                person_id = person_id.replace(/x|X$/i,"a");                       
                //获取18位证件号中的出生日期  
                birthday =person_id.substring(6,10)+"-"+person_id.substring(10,12)+
                          "-"+person_id.substring(12,14);  
                  
                //校验18位身份证号码的合法性  
                for (var i = 17; i >= 0; i--)   
                {  
                    sum += (Math.pow(2, i) % 11) * parseInt(person_id.charAt(17 - i), 11);  
                }  
                if (sum % 11 != 1) {      
                    $(this).addClass("txtRequired");                  
                    alert("身份证号码不符合国定标准，请核对！");                               
                    $("#certificateNumber").val("");  
                    return;  
                }             
            }  
            //检测证件地区的合法性                                  
            if (aCity[parseInt(person_id.substring(0, 2))] == null)   
            {  
                $(this).addClass("txtRequired");  
                alert("身份证地区未知，请核对！");                             
                $("#certificateNumber").val("");  
                return;  
            }  
            var dateStr = new Date(birthday.replace(/-/g, "/"));                  
            if (birthday != (dateStr.getFullYear()+"-"+ Append_zore(dateStr.getMonth()+1)+"-"
                           + Append_zore(dateStr.getDate()))) {  
                $(this).addClass("txtRequired");  
                alert("身份证出生日期非法！");                           
                $("#certificateNumber").val("");    
                return;  
            }  
            $(this).removeClass("txtRequired");
            //修改证件号码
            $("#dateOfBirth").val(birthday); 
            //带出性别
             var last = certNumber[certNumber.length - 2];
             if(last % 2 != 0)
                 $("#sex option[value='1']").attr("selected", true);
             else
                 $("#sex option[value='2']").attr("selected", true);
        }else  {     
            $(this).addClass("txtRequired");      
            alert("身份证号码格式非法！");                           
            $("#certificateNumber").val("");  
            return;  
        }             
    }  
}