Untitled

<!DOCTYPE HTML5>
<html>
<head>

</head>
<body>

<input type="number" id="numer1">
<input type="button" value="Zadanie 1" onClick="zad1()">

<h2 id="ile1">&nbsp;</h2>
<br><hr><br>


<input type="number" id="numer2">
<input type="button" value="Zadanie 2" onClick="zad2()">
<h2 id="wynik2">&nbsp;</h2>
<br><hr><br>


<input type="number" id="numer3">
<input type="button" value="Zadanie 3" onClick="zad3()">
<h2 id="wynik3">&nbsp;</h2>
<br><hr><br>


<input type="text" id="numer4">
<input type="button" value="Zadanie 4" onClick="button()">
<h2 id="wynik4">&nbsp;</h2>
<br><hr><br>


	<script>

        var test = document.getElementById"ile1".innerHTML;

		function zad1(){
		var x;
		x = document.getElementById("numer1").value;
		var dlugosc = x.length;

		test = "Ilosc cyfr w liczbie: " +dlugosc;
		}

		function zad2(){
		var liczba;
		liczba = document.getElementById("numer2").value;
		var str = liczba.length;
		var suma=0;

		for(i=0;i<str;i++){
		x=liczba.charAt(i)*liczba.charAt(i);
		suma=suma+x;
		}
		document.getElementById("wynik2").innerHTML = "Suma podanych elementow podniesiona do potegi wynosi: " +suma;
		}

		function zad3(){
		var x = document.getElementById("numer3").value;
		var tablica = [x.length];
		var liczby=0;

		for(i=0;i<x.length;i++){
		tablica[i] = x.charAt(i);
		}
		tablica.sort();
		for(i=0;i<x.length;i++){
		if(tablica[i] != tablica[i+1]){
		liczby++;
		}
		}
		document.getElementById("wynik3").innerHTML = "Liczba unikalnych liczb to: " +liczby;
		}


		function zad4(){
		var x = document.getElementById("numer4").value;
		var tablica = [x.length];
		var litery=0;

		for(i=0;i<x.length;i++){
		tablica[i] = x.charAt(i);
		}
		tablica.sort();
		for(i=0;i<x.length;i++){
		if(tablica[i] != tablica[i+1]){
		litery++;
		}
		}
		document.getElementById("wynik4").innerHTML = "Liczba unikalnych liter to: " +litery;
		}

		function button() {
		alert("I am an alert box!");
		}

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