<!DOCTYPE html>
<html lang="pl">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<form>
Malowanie pokoju - 8 zł za m<sup>2</sup><br>
Wymiary pokoju w metrach:<br>
<input id="s1" type="number"> <input id="s2" type="number"><br>
<input onclick="koszt()" type="button" value="OBLICZ KOSZTY"><br>
<p id="wynik1"></p><br>
<p id="wynik2"></p><br>
</form>
<script>
function koszt(){
var s1 = document.getElementById("s1").value;
var s2 = document.getElementById("s2").value;
if(s1<=0 || s2<=0){
wynik1="Błąd danych";
wynik2="Błąd danych";
}
else{
var wynik1 = ((s1*2.7)*2)+((s2*2.7)*2);
var wynik2 = wynik1*8;
}
document.getElementById("wynik1").innerHTML="Powierchnia całkowita ścian: "+wynik1;
document.getElementById("wynik2").innerHTML="Koszt malowania: "+wynik2;
}
</script>
</body>
</html>
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