Element: <div id="okno">
Obiekt: document.getElementById("okno")

Fragment kodu HTML

	<div id="menu">
	  <button onclick="location.href='index.html'">Start</button>
	  <button onclick="tekst_1()">Tekst 1</button>
	  <button onclick="tekst_2()">Tekst 2</button>
	  <button onclick="styl_1()">Styl 1</button>
	  <button onclick="styl_2()">Styl 2</button>
	</div>
	

Plik: skrypt.js

	function tekst_1(){
	  document.getElementById("okno").innerHTML = "<h1>Witaj Świecie!</h1>";
	}

	function tekst_2(){
	  document.getElementById("okno").innerHTML = "<h1>Hello World!</h1>";
	}

	function styl_1(){
	  document.getElementById("okno").style.color = "white";
	  document.getElementById("okno").style.backgroundColor = "black";
	}

	function styl_2(){
	  document.getElementById("okno").style.color = "blue";
	  document.getElementById("okno").style.backgroundColor = "white";
	}