JS verification ID card format example sharing

In development, sometimes it involves the registration of personal ID cards, so how to verify that the ID card format is correct? Next, attach a JS code to verify the ID card format:

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 isCardID(sId){
        var iSum=0 ;        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 "身份证号格式错误";
        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 "身份证号格式错误";        
        for(var i = 17;i>=0;i --) iSum += (Math.pow(2,i) % 11) * parseInt(sId.charAt(17 - i),11) ;       
         if(iSum%11!=1) return "身份证号格式错误！";       
          //aCity[parseInt(sId.substr(0,2))]+","+sBirthday+","+(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
        return true;
    }

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