var i, j=0, n=2, prime, p=new Array();
p[0]=2;
function primes() {
i=0, prime=true;
while(p[i]*p[i]<=n) {
if(n%p[i]==0) {
prime = false;
break;
}
i++;
}
if(prime) {
document.primeform.primeinput.value=n;
p[j++]=n++;
setTimeout('primes()',500);
}
else {
n++;
primes();
}
}