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 ;  
    var info="" ;  
    if(!/^\d{17}(\d|x)$/i.test(sId)) return false//"你输入的身份证长度或格式错误";   
    sId=sId.replace(/x$/i,"a");   
    if(aCity[parseInt(sId.substr(0,2))]==null) return false//"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 false//"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 false//"你输入的身份证号非法";   
    return true;//aCity[parseInt(sId.substr(0,2))]+","+sBirthday+","+(sId.substr(16,1)%2?"男":"女")   
}   

$('#idNumber').on('change', function () {
    var idNumber = $('#idNumber').val();
    var flag= isCardID(idNumber); 
    if (!flag) {
        layer.msg("请输入正确的身份证号!")
        return false;
    }
});