Untitled

<html>
<body bgcolor="blue" name="kolor" >

<input type=text id="l1"/>
<input type=text id="l2"/>
<input type=text id="l3"/>
<br>
<button onClick="silnia()"> SILNIA </button>
&nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp
<button onClick="iloczyn()"> ILOCZYN PARZYSTYCH </button>
&nbsp
<button onClick="wyswietl()"> WYSWIETL </button>

<script>


function silnia()
{
var wynik=1;;
var lib = parseInt(document.getElementById("l1").value);

for (lib;lib>0;lib--)

while (lib > 0 )
{
        wynik = wynik * lib;
        lib = lib - 1;
}

alert (wynik)
};

function iloczyn()
{
	var a = parseInt(document.getElementById("l1").value);
	var b = parseInt(document.getElementById("l2").value);
	var c = parseInt(document.getElementById("l3").value);

	var ap=1;
	var bp=1;
	var cp=1;
	if (a%2==0)
	ap=a;
	if (b%2==0)
	bp=b;
	if (c%2==0)
	cp=c;

	alert(ap*bp*cp);

};

function wyswietl()
{
	var a = parseInt(document.getElementById("l1").value);
	var b = parseInt(document.getElementById("l2").value);

	if (a>b)
	{
    var tmp;
	tmp = a;
	a = b;
	b = tmp;
	}


	if (b>30)
	{
	b=30;
	};


	for (a;a<=b;a++)
	{
		document.write(a)+" ";
	};


};

</script>
</body>
</html>