--Source Code kalkulator.js--
function kalkulator(){
var kalkulator = document.mat;
var input1 = parseInt(kalkulator.input1.value);
var input2 = parseInt(kalkulator.input2.value);
var operasi = kalkulator.operasi.value;
var hasil;
if(operasi == "tambah"){
hasil = input1 + input2;
}
else if(operasi == "kurang"){
hasil = input1 - input2;
}
else if(operasi == "kali"){
hasil = input1 * input2;
}
else{
hasil = input1 / input2;
}
kalkulator.hasil.value = hasil;
}
--Source code kalkulator.html--
<!DOCTYPE html>
<html lang="en">
<head>
<title>Kalkulator</title>
<script language="JavaScript" type="text/javascript" src="kalkulator.js"></script>
</head>
<body bgcolor="LightBlue">
<center>
<h2>-->> Kalkulator Sederhana <<--</h2>
<form name="mat" action="#">
<input type="text" size="7" name="input1">
<select name="operasi">
<option value="tambah">+</option>
<option value="kurang">-</option>
<option value="kali">*</option>
<option value="bagi">:</option>
</select>
<input type="text" size="7" name="input2">
<input type="button" value="=" onclick="kalkulator()"/>
<input type="text" size="10" name="hasil" readonly>
</form>
</center>
</body>
</html>
--Screenshoot kalkulator--
