<head>
<title>Studi Kasus Modul 5</title>
<script type="text/javascript" src="sk.js"></script>
</head>
<body>
<form name="form">
<input type="text" name="a"/>
<select name="option">
<option value="tambah">+</option>
<option value="kurang">-</option>
<option value="kali">*</option>
<option value="bagi">/</option>
<option value="pangkat">^</option>
</select>
<input type="text" name="b"/>
<input type="button" value="=" onClick="rumus()"/>
<input type="text" name="hasil"/>
<input type="button" value="Clear" onClick="kosong()">
</form>
</body>
</html>
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function rumus(){
var proses = document.form;
var a = parseInt(proses.a.value);
var b = parseInt(proses.b.value);
pilih = (proses.option.value);
if(pilih == "tambah"){
c = a + b;
proses.hasil.value = c;
}
else if(pilih == "kurang"){
c = a - b;
proses.hasil.value = c;
}
else if(pilih == "kali"){
c = a * b;
proses.hasil.value = c;
}
else if(pilih == "bagi"){
c = a / b;
proses.hasil.value = c;
}
else if(pilih == "pangkat"){
c = Math.pow(a, b);
proses.hasil.value = c;
}
}
function kosong(){
form.a.focus()
form.a.value=""
form.b.value=""
form.hasil.value=""
}
Hasilnya
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