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1.<!DOCTYPE html>
<html lang="pl">
<head>
  <meta charset="utf-8">
  <title>test4</title>
  <script src="test4.js"></script>
</head>
<body>
<form name="form1">
<input name="a" type="text" value="">
<input name="b1" type="button" value="klik1" onclick="klik1()">
<input name="b2" type="button" value="klik2" onclick="klik2()">
<input name="b3" type="button" value="klik3" onclick="klik3()">
</form>
</body>
</html>
function klik1()
{
  alert("Hello");
}
function klik2()
{
  document.body.style.background = "red";
}
function klik3()
{
  document.body.style.background = "silver";
}


2.<!DOCTYPE html>
<html lang="pl">
<head>
  <meta charset="utf-8">
  <title>test5</title>
  <script src="test4.js"></script>
</head>
<body>
<form name="form2">
Co oznacza słowo "dog" po ang.?<br>
<input name="p1" type="radio" value="0"> Kot<br>
<input name="p1" type="radio" value="1"> Pies<br>
<input name="p1" type="radio" value="2"> Sowa<br>
<input name="p1" type="radio" value="3"> Ryba<br>
<hr>
Co oznacza słowo "yellow" po ang.?<br>
<input name="p2" type="radio" value="0"> Czerwony<br>
<input name="p2" type="radio" value="1"> Niebieski<br>
<input name="p2" type="radio" value="2"> Biały<br>
<input name="p2" type="radio" value="3"> Żółty<br>
<hr>
Co oznacza słowo "fish" po ang.?<br>
<input name="p3" type="radio" value="0"> Pies<br>
<input name="p3" type="radio" value="1"> Kot<br>
<input name="p3" type="radio" value="2"> Koń<br>
<input name="p3" type="radio" value="3"> Ryba<br>
<hr>
<input name="b1" type="button" value="spr" onclick="klik4()">
</form>
</body>
</html>


3.<!DOCTYPE html>
<html lang="pl">
<head>
  <meta charset="utf-8">
  <title>test6</title>
  <script src="test4.js"></script>
</head>
<body>
<form name="form3">
<input name="b1" type="button" value="-" onclick="minus()" onmousemove="minus()">
<input name="a" type="text" value="0">
<input name="b2" type="button" value="+" onclick="plus()" onmousemove="plus()">
<br> <input name="b3" type="button" value="0" onclick="zero()">
</form>
</body>
</html>


function minus()
{
var x = parseInt(form3.a.value);
form3.a.value = --x;
}
function plus()
{
var x = parseInt(form3.a.value);
form3.a.value = ++x;
}
function zero()
{
form3.a.value = "0";
}


4.Równanie kwadratowe

<form name="form1">
a=<input type="text" name="a">
b=<input type="text" name="b">
c=<input type="text" name="c">
<input type="button" value="ok" onclick="oblicz()">
</form>

<script>
function oblicz()
{
  var a = parseInt(form1.a.value);
  var b = parseInt(form1.b.value);
  var c = parseInt(form1.c.value);
  var delta=b*b-4*a*c;
  if(delta<0) alert("Brak rozwiazan!");
  if(delta==0)
  {
    var x=(-b/2*a);
    alert("x="+x);
  }
  if(delta>0)
  {
    var x1=(-b-Math.sqrt(delta))/(2*a);
    var x2=(-b+Math.sqrt(delta))/(2*a);
    alert("x1="+x1+" x2="+x2);
  }
}
</script>

liczba do potegi

<form name="form1">
liczba=<input type="text" name="a">
potega=<input type="text" name="b">
<input type="button" value="ok" onclick="oblicz()">
</form>

5.<script>
function oblicz()
{
  var a = parseInt(form1.a.value);
  var b = parseInt(form1.b.value);
  alert(Math.pow(a, b))
}
</script>

dodawanie 2 liczb
<form name="form1">
a=<input type="text" name="a">
b=<input type="text" name="b">
<input type="button" value="ok" onclick="oblicz()">
</form>

6.<script>
function oblicz()
{
  var a = parseInt(form1.a.value);
  var b = parseInt(form1.b.value);
  alert(a+b);
}
</script>