js校验身份证号码并填写出生日期和性别

今天给证件号码加了个校验,18位的证件号码能读取人所在的省份和人员的出生日期,性别,代码如下

<script type="text/javascript">
 //给人的证件号码注册失去焦点校验的事件
   $(function(){
      $("#zjhm").blur(function(){
        var zjlx=$("#zjlx").val();
         if(!zjlx){
            alert("请您先选择证件类型!");
            return;
         }
         var zjhm=$("#zjhm").val();
         if(zjhm){
             if(cidInfo(zjhm)){//返回有值的时候执行
                 alert(cidInfo(zjhm));
                 $("#zjhm").focus();
                  return ;
             }else{//返回为false或者undfinded的时候执行,校验通过
             }
         }else{
            alert("请您填写证件号码!");
         }
         var params={
           ajaxZjlx:zjlx,
           ajaxZjhm:zjhm,
           id:$("#ryjbxxid").val()
         };
         var url="${path}/enterprisemsg/declareinfo/process_ryjbxx/process_ryjbxx!ajaxCheck.action";
         $.ajax({
           type: "POST",
           url: url,
           data: params,
           success: function(msg){
              if(msg.msg){
                 alert(msg.msg);
                 $("#zjhm").focus();
              }
           }
         });
      });
   });
     
     
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"} 
  
function cidInfo(sId){ 
    var iSum=0 
    var info=""
       
    if(!/(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/i.test(sId)){// 身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X  
       return "您输入的身份证号码不正确,请重新输入!";
    }
    if(/^\d{17}(\d|x)$/i.test(sId)){//18位身份证
        sId=sId.replace(/x$/i,"a"); 
        if(aCity[parseInt(sId.substr(0,2))]==null)return "您输入的身份证地区非法!"; 
        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 "您输入的身份证号的生日非法"; 
        for(var i = 17;i>=0;i --) iSum += (Math.pow(2,i) % 11) * parseInt(sId.charAt(17 - i),11) 
        if(iSum%11!=1)return "您输入的身份证号码非法!"; 
        $("#csny").val(sBirthday);
        sId.substr(16,1)%2?$("#xb").find("option[value=0]").attr("selected",true):$("#xb").find("option[value=1]").attr("selected",true);
        //return aCity[parseInt(sId.substr(0,2))]+","+sBirthday+","+(sId.substr(16,1)%2?"男":"女") 
          
    }
} 
 </script>