function fact(n) {
	if( n <= 1) return 1;
	return fact(n-1)*n ;
}

function ncr(n, r) {
	return fact(n)/(fact(n-r)*fact(n));
}

function binomial() {
	var n = document.getElementById("n").value;
	var p = document.getElementById("p").value;
	var s = document.getElementById("s").value;
	
	var xeqx = ncr(n,s)*p^s*(1-p)^(n-s);
	var i=0;
	var xltx = 0;
	while (i < s) {
		xltx += ncr(n,i)*p^i*(1-p)^(n-i);
	}
	
	alert("x=x "+xeqx);
	alert("x<x "+xltx);
	
	return false;
}