<!Doctype html> <html> <head> <title>Taskai</title> <meta charset="utf-8"> <script> function taskai(){ var a = +prompt("iveskite skaiciu"); document.getElementById("taskas").innerHTML = a; } </script> </head> <body> <input type="button" id="mygtukas" value="Taskai" onclick="taskai()"></input> <div> Taskai: <span id="taskas"></span> </div> </body> </html>