<script language="JavaScript">
<!--
function Ergebnis()
{
var x = 0;
x = eval(window.document.Rechner.Display.value);
window.document.Rechner.Display.value = x;
}
function Hinzufuegen(Zeichen)
{
window.document.Rechner.Display.value =
window.document.Rechner.Display.value + Zeichen;
}
function Sonderfunktion(Funktion)
{
if(Funktion == "sqrt")
{
var x = 0;
x = eval(window.document.Rechner.Display.value);
window.document.Rechner.Display.value = Math.sqrt(x);
}
if(Funktion == "pow")
{
var x = 0;
x = eval(window.document.Rechner.Display.value);
window.document.Rechner.Display.value = x * x;
}
if(Funktion == "log")
{
var x = 0;
x = eval(window.document.Rechner.Display.value);
window.document.Rechner.Display.value = Math.log(x);
}
}
//-->
</script>
<form name="Rechner">
<table border="8" cellpadding="10">
<tbody>
<tr>
<td bgcolor="#c0c0c0"><input maxlength="30" size="30" name="Display" type="text" /></td>
</tr>
<tr>
<td>
<table>
<tbody>
<tr>
<td width="50"><input type="button" onClick="Hinzufuegen('7')" value=" 7 " /></td>
<td width="50"><input type="button" onClick="Hinzufuegen('8')" value=" 8 " /></td>
<td width="70"><input type="button" onClick="Hinzufuegen('9')" value=" 9 " /></td>
<td width="50"><input type="button" onClick="Hinzufuegen('+')" value=" + " /></td>
</tr>
<tr>
<td width="50"><input type="button" onClick="Hinzufuegen('4')" value=" 4 " /></td>
<td width="50"><input type="button" onClick="Hinzufuegen('5')" value=" 5 " /></td>
<td width="70"><input type="button" onClick="Hinzufuegen('6')" value=" 6 " /></td>
<td width="50"><input type="button" onClick="Hinzufuegen('-')" value=" - " /></td>
</tr>
<tr>
<td width="50"><input type="button" onClick="Hinzufuegen('1')" value=" 1 " /></td>
<td width="50"><input type="button" onClick="Hinzufuegen('2')" value=" 2 " /></td>
<td width="70"><input type="button" onClick="Hinzufuegen('3')" value=" 3 " /></td>
<td width="50"><input type="button" onClick="Hinzufuegen('*')" value=" * " /></td>
</tr>
<tr>
<td width="50"><input type="button" onClick="Ergebnis()" value=" = " /></td>
<td width="50"><input type="button" onClick="Hinzufuegen('0')" value=" 0 " /></td>
<td width="70"><input type="button" onClick="Hinzufuegen('.')" value=" . " /></td>
<td width="50"><input type="button" onClick="Hinzufuegen('/')" value=" / " /></td>
</tr>
<tr>
</tr>
<tr>
<td width="50"><input type="button" onClick="Sonderfunktion('sqrt')" value="sqrt " /></td>
<td width="50"><input type="button" onClick="Sonderfunktion('pow')" value=" pow " /></td>
<td width="70"><input type="button" onClick="Sonderfunktion('log')" value=" log " /></td>
<td width="50"><input type="reset" value=" C " /></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</form>
