强大的身份证号码验证，绝对成功

function getIdCardInfo(idcard){
        var sigma = 0;
        var a = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 );
        var w = new Array("1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2");
        for(var i = 0; i < 17; i++) {
            var ai = parseInt(idcard.substring(i, i + 1));
            var wi = a[i];
            sigma += ai * wi;
        }
        var number = sigma % 11;
        return idcard.substring(0,17)+w[number];
    }
    function idCard15To18(id){
        var W = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1);
        var A = new Array("1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2");
        var i,j,s=0;
        var newid;
        newid = id;
        newid = newid.substring(0,6)+"19"+newid.substring(6,id.length);
        for(i=0;i<newid.length;i++ ){
            j= parseInt(newid.substring(i,i+1))*W[i];
            s=s+j;
        }
        s = s % 11;
        newid=newid+A[s];
        return newid;
    }

if(value.length==18){
     return getIdCardInfo(value)==value;
}else if(value.length==15){
     var id18=idCard15To18(value);
     return getIdCardInfo(id18)==value;
}else{
     return false;
}