Taschenrechner
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<script language="JavaScript">
function typein(form, d)
{
form.acc.value += d;
}
function compute(form)
{
if (form.acc.value != "")
form.acc.value = eval(form.acc.value);
}
</script>
</head>
<body>
<h1>Taschenrechner</h1>
<form>
<font face="Courier New">
<input type="button" value=" 1 " onClick="typein(this.form, '1')">
<input type="button" value=" 2 " onClick="typein(this.form, '2')">
<input type="button" value=" 3 " onClick="typein(this.form, '3')">
<input type="button" value=" + " onClick="typein(this.form, '+')">
<br>
<input type="button" value=" 4 " onClick="typein(this.form, '4')">
<input type="button" value=" 5 " onClick="typein(this.form, '5')">
<input type="button" value=" 6 " onClick="typein(this.form, '6')">
<input type="button" value=" - " onClick="typein(this.form, '-')">
<br>
<input type="button" value=" 7 " onClick="typein(this.form, '7')">
<input type="button" value=" 8 " onClick="typein(this.form, '8')">
<input type="button" value=" 9 " onClick="typein(this.form, '9')">
<input type="button" value=" x " onClick="typein(this.form, '*')">
<br>
<input type="button" value=" 0 " onClick="typein(this.form, '0')">
<input type="button" value=" ( " onClick="typein(this.form, '(')">
<input type="button" value=" ) " onClick="typein(this.form, ')')">
<input type="button" value=" / " onClick="typein(this.form, '/')">
<br>
<input type="reset" value=" C ">
<input type="button" value=" . " onClick="typein(this.form, '.')">
<input type="button" value=" = " onClick="compute(this.form)">
<p>
Ausgabe:<br>
<input type="text" name="acc" onFocus="compute(this.form)" size=10>
</font>
</form>
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