function calc()
{
jxz = 1*0;
ka = 1*document.n.elements[0].value;
kb = 1*document.n.elements[1].value;
d05 = 1*0;
u05 = 1*0;
d025 = 1*0;
u025 = 1*0;
d01 = 1*0;
u01 = 1*0;

if(kb>ka)
{
alert("n_b must be equal to or less than n_a.");
jxz++;
}<!--end.if-->

if(kb>20||ka>20)
{
alert("n_a and n_b must be equal to or less than 20.");
jxz++;
}<!--end.if-->

if(ka<5||kb<5)
{
alert("n_a and n_b must be equal to or greater than 5.");
jxz++;
}<!--end.if-->


if(ka<21 && kb<21 && ka>4)
{

if(ka==kb)
{
d05 = Math.round((0.4359244*(kb*kb)) + (-1.965756*kb) + 3.070378);
u05 = Math.round((0.5640756*(kb*kb)) + (1.965756*kb) + (-3.070378));
d025 = Math.round((0.4177171*kb*kb) + (-2.14881*kb) + 2.715336);
u025 = Math.round((0.5822829*kb*kb) + (2.14881*kb) + (-2.715336));
d01 = Math.round((0.4002101*kb*kb) + (-2.496429*kb) + 3.668067);
u01 = Math.round((0.5997899*kb*kb) + (2.496429*kb) + (-3.668067));
}<!--end if-->
if(ka==kb+1)
{
d05 = Math.round((0.4242889*kb*kb) + (-1.257935*kb) + 0.7442146);
u05 = Math.round((0.5757111*kb*kb) + (2.257935*kb) + (-0.7442146));
d025 = Math.round((0.4096639*kb*kb) + (-1.531933*kb) + 0.5445378);
u025 = Math.round((0.5903361*kb*kb) + (2.531933*kb) + (-0.5445378));
d01 = Math.round(0.3944732*kb*kb + -1.974499*kb + 1.793019);
u01 = Math.round(0.6055268*kb*kb + 2.974499*kb + -1.793019);
}<!--end if-->
if(ka==kb+2)
{
d05 = Math.round((0.4292582*kb*kb) + (-0.9037088*kb) + 0.004945055);
u05 = Math.round((0.5707418*kb*kb) + (2.903709*kb) + (-0.004945055));
d025 = Math.round(0.418956*kb*kb + -1.389835*kb + 1.33956);
u025 = Math.round(0.581044*kb*kb + 3.389835*kb + -1.33956);
d01 = Math.round(0.4052198*kb*kb + -1.840934*kb + 2.067033);
u01 = Math.round(0.5899725*kb*kb + 3.927335*kb + -2.418132);
}<!--end if-->
if(ka==kb+3)
{
d05 = Math.round((0.4340659*kb*kb) + (-0.6428571*kb) + 0.3186813);
u05 = Math.round(0.5659341*kb*kb + 3.642857*kb + -0.3186813);
d025 = Math.round(0.4225774*kb*kb + -1.087912*kb + 1.072927);
u025 = Math.round(0.5774226*kb*kb + 4.087912*kb + -1.072927);
d01 = Math.round(0.4030969*kb*kb + -1.423077*kb + 1.004995);
u01 = Math.round(0.5969031*kb*kb + 4.423077*kb + -1.004995);
}<!--end if-->
if(ka==kb+4)
{
d05 = Math.round(0.4163337*kb*kb + 0.1695804*kb + -2.226024);
u05 = Math.round(0.5836663*kb*kb + 3.83042*kb + 2.226024);
d025 = Math.round(0.4173327*kb*kb + -0.5087413*kb + -0.8923576);
u025 = Math.round(0.5826673*kb*kb + 4.508741*kb + 0.8923576);
d01 = Math.round(0.4100899*kb*kb + -1.122378*kb + 0.01898102);
u01 = Math.round(0.5899101*kb*kb + 5.122378*kb + -0.01898102);
}<!--end if-->
if(ka==kb+5)
{
d05 = Math.round(0.4487179*kb*kb + -0.05617716*kb + -0.06993007);
u05 = Math.round(0.5512821*kb*kb + 5.056177*kb + 0.06993007);
d025 = Math.round(0.4114219*kb*kb + -0.05571096*kb + -1.79021);
u025 = Math.round(0.5885781*kb*kb + 5.055711*kb + 1.79021);
d01 = Math.round(0.3939394*kb*kb + -0.4424242*kb + -2);
u01 = Math.round(0.6060606*kb*kb + 5.442424*kb + 2);
}<!--end if-->
if(ka==kb+6)
{
d05 = Math.round(0.4318182*kb*kb + 0.6924242*kb + -2.312121);
u05 = Math.round(0.5681818*kb*kb + 5.307576*kb + 2.312121);
d025 = Math.round(0.4090909*kb*kb + 0.469697*kb + -3.557576);
u025 = Math.round(0.5909091*kb*kb + 5.530303*kb + 3.557576);
d01 = Math.round(0.3977273*kb*kb + -0.1810606*kb + -2.156061);
u01 = Math.round(0.6022727*kb*kb + 6.181061*kb + 2.156061);
}<!--end if-->
if(ka==kb+7)
{
d05 = Math.round(0.4209957*kb*kb + 1.272078*kb + -3.800433);
u05 = Math.round(0.5790043*kb*kb + 5.727922*kb + 3.800433);
d025 = Math.round(0.4209957*kb*kb + 0.5720779*kb + -2.500433);
u025 = Math.round(0.5790043*kb*kb + 6.427922*kb + 2.500433);
d01 = Math.round(0.4220779*kb*kb + -0.2307359*kb + -1.592208);
u01 = Math.round(0.5779221*kb*kb + 7.230736*kb + 1.592208);
}<!--end if-->
if(ka==kb+8)
{
d05 = Math.round(0.452381*kb*kb + 1.166667*kb + -2.22619);
u05 = Math.round(0.547619*kb*kb + 6.833333*kb + 2.22619);
d025 = Math.round(0.452381*kb*kb + 0.452381*kb + -1.654762);
u025 = Math.round(0.547619*kb*kb + 7.547619*kb + 1.654762);
d01 = Math.round(0.422619*kb*kb + 0.1369048*kb + -2.541667);
u01 = Math.round(0.577381*kb*kb + 7.863095*kb + 2.541667);
}<!--end if-->
if(ka==kb+9)
{
d05 = Math.round(0.4166667*kb*kb + 2.154762*kb + -5.142857);
u05 = Math.round(0.5833333*kb*kb + 6.845238*kb + 5.142857);
d025 = Math.round(0.4166667*kb*kb + 1.511905*kb + -5);
u025 = Math.round(0.5833333*kb*kb + 7.488095*kb + 5);
d01 = Math.round(0.3809524*kb*kb + 1.119048*kb + -5.285714);
u01 = Math.round(0.6190476*kb*kb + 7.880952*kb + 5.285714);
}<!--end if-->
if(ka==kb+10)
{
d05 = Math.round(0.5*kb*kb + 1.242857*kb + -0.5714286);
u05 = Math.round(0.5*kb*kb + 8.757143*kb + 0.5714286);
d025 = Math.round(0.4107143*kb*kb + 1.982143*kb + -6);
u025 = Math.round(0.5892857*kb*kb + 8.017857*kb + 6);
d01 = Math.round(0.4285714*kb*kb + 0.8*kb + -3.857143);
u01 = Math.round(0.5714286*kb*kb + 9.2*kb + 3.857143);
}<!--end if-->
if(ka==kb+11)
{
d05 = Math.round(0.4285714*kb*kb + 2.8*kb + -5.857143);
u05 = Math.round(0.5714286*kb*kb + 8.2*kb + 5.857143);
d025 = Math.round(0.4285714*kb*kb + 2.2*kb + -6.657143);
u025 = Math.round(0.7857143*kb*kb + 5.5*kb + 18.22857);
d01 = Math.round(0.4285714*kb*kb + 1*kb + -3.657143);
u01 = Math.round(0.5714286*kb*kb + 10*kb + 3.657143);
}<!--end if-->
if(ka==kb+12)
{
d05 = Math.round(0.5*kb*kb + 2.5*kb + -5);
u05 = Math.round(0.5*kb*kb + 9.5*kb + 5);
d025 = Math.round(0.5*kb*kb + 1.5*kb + -3);
u025 = Math.round(0.5*kb*kb + 10.5*kb + 3);
d01 = Math.round(0.5*kb*kb + 0.5*kb + -2);
u01 = Math.round(0.5*kb*kb + 11.5*kb + 2);
}<!--end if-->
if(ka==kb+13)
{
d05 = Math.round(0.5*kb*kb + 2.5*kb + -3);
u05 = Math.round(0.5*kb*kb + 10.5*kb + 3);
d025 = Math.round(1*kb*kb + -4*kb + 13);
u025 = Math.round(17*kb + -13);
d01 = Math.round(1*kb*kb + -5*kb + 14);
u01 = Math.round(18*kb + -14);
}<!--end if-->
if(ka==kb+14)
{
d05 = Math.round(9*kb-22);
u05 = Math.round(16*kb-8);
d025 = Math.round(8*kb-21);
u025 = Math.round(17*kb-9);
d01 = Math.round(7*kb-20);
u01 = Math.round(18*kb-10);
}<!--end if-->
if(ka==20 && kb==5)
{
d05 = 1*25;
u05 = 1*75;
d025 = 1*20;
u025 = 1*80;
d01 = 1*16;
u01 = 1*84;
}<!--end if-->
document.ucrit.elements[1].value = d05;
document.ucrit.elements[4].value = u05;
document.ucrit.elements[2].value = d025;
document.ucrit.elements[5].value = u025;
document.ucrit.elements[3].value = d01;
document.ucrit.elements[6].value = u01;
}<!--end if-->

if(jxz>0)
{
document.ucrit.elements[1].value = "";
document.ucrit.elements[4].value = "";
document.ucrit.elements[2].value = "";
document.ucrit.elements[5].value = "";
document.ucrit.elements[3].value = "";
document.ucrit.elements[6].value = "";
}<!--end if-->
}<!--end.f.calc-->