身份证验证

 

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)
{
    if(sId.length == 15)
    {
        return checkID15(sId);
    }
    else if(sId.length == 18)
    {
        return checkID18(sId);
    }
    else
    {
        return false;
    }


}
function checkID15(IDCard)
{
    if(!/^\d{15}$/i.test(IDCard))
    {
        return false;
    }
    if(aCity[parseInt(IDCard.substr(0,2))]==null)
    {
        return false;    
    }
    sBirthday = "19" + IDCard.substr(6,2) + "-" + Number(IDCard.substr(8,2)) + "-" + Number(IDCard.substr(10,2));
    var d=new Date(sBirthday.replace(/-/g,"/"));
    if(sBirthday!=(d.getFullYear()+"-"+ (d.getMonth()+1) + "-" + d.getDate()))
    {
         return false;    
    }
    else
    {
        return true;    
    }    
}
function checkID18(sId)
{
    var iSum=0
    var info=""
    if(!/^\d{17}(\d|x)$/i.test(sId))
    {
        return false;
    }
    sId=sId.replace(/x$/i,"a");
    if(aCity[parseInt(sId.substr(0,2))]==null)
    {
        return false;    
    }
    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;    
    }
    
    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;    
    }
    
    return true;
}

</script>