這個代碼來自于盛大網站，被一個叫bones的同學發現，于是就流傳出來了，哈哈，此代碼非常簡潔明了，值得學些！Javascript驗證18位身份證的代碼：

iW = new Array(7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2,1);
iSum = 0;
for( i=0;i<17;i++){
    iC = v_card.charAt(i) ;
    iVal = parseInt(iC);
    iSum += iVal * iW[i];
}
iJYM = iSum % 11;
var sJYM = '';
if(iJYM == 0) sJYM = "1";
else if(iJYM == 1) sJYM = "0";
else if(iJYM == 2) sJYM = "x";
else if(iJYM == 3) sJYM = "9";
else if(iJYM == 4) sJYM = "8";
else if(iJYM == 5) sJYM = "7";
else if(iJYM == 6) sJYM = "6";
else if(iJYM == 7) sJYM = "5";
else if(iJYM == 8) sJYM = "4";
else if(iJYM == 9) sJYM = "3";
else if(iJYM == 10) sJYM = "2";
var cCheck = v_card.charAt(17).toLowerCase();
if( cCheck != sJYM ){
    return false; //對不上就是假號碼
}