<script languange="JavaScript" type="text/javascript">
function licz(x)
{
var Lancuch = new Array('0','0','83','174','276','388','512','650','801','969','1154','1358','1584','1833','2107','2411','2746','3115','3523','3973','4470','5018','5624','6291','7028','7842','8740','9730','10824','12031','13363','14833','16456','18247','20224','22406','24815','27473','30408','33648','37224','41171','45529','50339','55649','61512','67983','75127','83014','91721','101333','111945','123660','136594','150872','166636','184040','203254','224466','247886','273742','302288','333804','368599','407015','449428','496254','547953','605032','668051','737627','814445','899257','992895','1096278','1210421','1336443','1475581','1629200','1798808','1986068','2192818','2421087','2673114','2951373','3258594','3597792','3972294','4385776','4842295','5346332','5902831','6517253','7195629','7944614','8771558','9684577','10692629','11805606','13034431','200000000') ;
document.getElementById("dane2").value=Lancuch[document.getElementById("dane1").value];
document.getElementById("dane3").value = parseFloat(document.getElementById("dane1").value) + parseFloat(document.getElementById("dane2").value);
}
function dwa(x)
{
var Lancuch = new Array(0,0,83,174,276,388,512,650,801,969,1154,1358,1584,1833,2107,2411,2746,3115,
3523,3973,4470,5018,5624,6291,7028,7842,8740,9730,10824,12031,13363,14833,16456,1
8247,20224,22406,24815,27473,30408,33648,37224,41171,45529,50339,55649,61512,6798
3,75127,83014,91721,101333,111945,123660,136594,150872,166636,184040,203254,22446
6,247886,273742,302288,333804,368599,407015,449428,496254,547953,605032,668051,73
7627,814445,899257,992895,1096278,1210421,1336443,1475581,1629200,1798808,1986068
,2192818,2421087,2673114,2951373,3258594,3597792,3972294,4385776,4842295,5346332,
5902831,6517253,7195629,7944614,8771558,9684577,10692629,11805606,13034431,200000
000) ;
var b=0;
while(Lancuch[b]<document.getElementById("dane2").value)
b++;
document.getElementById("dane1").value=(b-1);
}
function trzy()
{
alert("?
"); }
<input id="dane1" type="text" name="dane1" onkeyup="licz(this.form)" maxlength="2">+
<input id="dane2" type="text" name="dane2" onkeyup="dwa(this.form)" maxlength="9">=
<input id="dane3" name="wynik" type="text" onkeyup="trzy()">