javascript判斷身份證号資訊是否正确的方法

    網站注冊經常需要用到實名認證需要使用者或者玩家提供身份證資訊，在送出到伺服器之前需要做一個正确性的判斷，可以用一個js函數實作

checkRealCard:function(strRealCard){
            var getAppendZore = function(strNum){
                if(strNum < 10){ strNum = '0'+strNum; }
                return strNum;
            };
            var tmpRealCard = strRealCard;
            var tmpCityCode = { 11: "北京", 12: "天津", 13: "河北", 14: "山西", 15: "内蒙古", 21: "遼甯", 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: "雲南", 54: "西藏", 61: "陝西", 62: "甘肅", 63: "青海", 64: "甯夏", 65: "新疆", 71: "台灣", 81: "香港", 82: "澳門", 91: "國外" };

            if (tmpRealCard == ''){ return '身份證号碼不能為空'; }

            // Check real card.
            var tmpRegx=new RegExp(/(^\d{15}$)|(^\d{17}(\d|x|X)$)/i);
            if (!tmpRegx.exec(tmpRealCard)){
                return '身份證号碼長度必須正确，請核對！';
            }

            // Check 15 length.
            var tmpRegx=new RegExp(/^[1-9]\d{7}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{3}$/);
            if (tmpRegx.exec(tmpRealCard)){
                tmpBirthday = '19'+tmpRealCard.substring(6,8)+'-'+tmpRealCard.substring(8,10)+'-'+tmpRealCard.substring(10,12);
            }else{
                tmpSum = 0;

                tmpRealCard = tmpRealCard.replace(/x|X$/i,"a");

                for (var i = 17; i >= 0; i--){
                    tmpSum += (Math.pow(2, i) % 11) * parseInt(tmpRealCard.charAt(17 - i), 11);
                }

                if (tmpSum % 11 != 1) {
                    return '身份證号碼不符相關标準，請核對！';
                }

                tmpBirthday = tmpRealCard.substring(6,10)+'-'+tmpRealCard.substring(10,12)+'-'+tmpRealCard.substring(12,14);
            }

            // Check City.
            if (tmpCityCode[parseInt(tmpRealCard.substring(0, 2))] == null){
                return '身份證号碼證件地區未知，請核對！';
            }

            // Check Birthday.
            var tmpDate = new Date(tmpBirthday.replace(/-/g, "/"));
            if (tmpBirthday != (tmpDate.getFullYear()+'-'+ getAppendZore(tmpDate.getMonth()+1)+'-'+ getAppendZore(tmpDate.getDate()))){
                return '身份證号碼出生日期非法，請核對！';
            }

            //alert(tmpBirthday);
            return true;
        },