<head>
<title>Calc-Easy</title>
<script language="javascript" type="text/javascript">
<!--
var flag = false;
function isi(num) {
if (flag) calc.j.value += num;
else calc.i.value += num;
}
function tambah()
{
calc.operator.value = ' + '
flag = true;
calc.j.focus()
}
function kurang()
{
calc.operator.value = ' - '
flag = true;
calc.j.focus()
}
function kali()
{
calc.operator.value = ' * '
flag = true;
calc.j.focus()
}
function bagi()
{
calc.operator.value = ' / '
flag = true;
calc.j.focus()
}
//-->
</script>
</style>
</head>
Perhitungan Sederhana
<form name="calc">
<tr>
<td>
<input type="text" name="i" size="2" />
<select name="operator" onchange="setSelected(this);">
<option>-Operator-</option>
<option value="*">*</option>
<option value="/">/</option>
<option value="+">+</option>
<option value="-">-</option>
</select>
<input type="text" name="j" size="2" />
<input type="button" name="hasil" value="=" onclick="calc.k.value=eval(calc.i.value+calc.operator.value+calc.j.value)" />
<input type="text" name="k" size="2" disabled="true" />
<br/>
</td>
</tr>
</table>
</form>
</body>
</html>
