| <![CDATA[
<html>
<head>
<title>
JavaScript DESTINATION - P007
</title>
<script language="JavaScript">
<!--
function compute(obj)
{
obj.expr.value = eval(obj.expr.value);
}
var one = '1';
var two = '2';
var three = '3';
var four = '4';
var five = '5';
var six = '6';
var seven = '7';
var eight = '8';
var nine = '9';
var zero = '0';
var plus = '+';
var minus = '-';
var multiply = '*';
var divide = '/';
var decimal = '.';
function enter(obj, string)
{
obj.expr.value += string;
}
function clear(obj)
{
obj.expr.value = '';
}
<!-- -->
</script>
</head>
<body>
<form name="calculator">
<table border=1>
<tr>
<td colspan=4>
<input type="text" name="expr" size=30 action="compute(this.form)"> </tr><tr>
<td><input type="button" value=" 7 " onClick="enter(this.form, seven)">
<td><input type="button" value=" 8 " onClick="enter(this.form, eight)">
<td><input type="button" value=" 9 " onClick="enter(this.form, nine)">
<td><input type="button" value=" / " onClick="enter(this.form, divide)">
</tr>
<tr>
<td><input type="button" value=" 4 " onClick="enter(this.form, four)">
<td><input type="button" value=" 5 " onClick="enter(this.form, five)">
<td><input type="button" value=" 6 " onClick="enter(this.form, six)">
<td><input type="button" value=" * " onClick="enter(this.form, multiply)">
</tr>
<tr>
<td><input type="button" value=" 1 " onClick="enter(this.form, one)">
<td><input type="button" value=" 2 " onClick="enter(this.form, two)">
<td><input type="button" value=" 3 " onClick="enter(this.form, three)">
<td><input type="button" value=" - " onClick="enter(this.form, minus)">
</tr>
<tr>
<td colspan=2><input type="button" value=" 0 " onClick="enter(this.form, zero)">
<td><input type="button" value=" . " onClick="enter(this.form, decimal)">
<td><input type="button" value=" + " onClick="enter(this.form, plus)">
</tr>
<tr>
<td colspan=2><input type="button" value=" = " onClick="compute(this.form)">
<td colspan=2><input type="button" value="AC" size= 3 onClick="clear(this.form)">
</table>
</form>
</body>
</html>
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