<center>
<script language="Javascript">
<!--
// please keep these lines on when you copy the source
// made by: Ali AKYILDIRIM - http://neunkirchen.kolayweb.com
<!--
function Oblicz(Objec) {
Objec.domesum.value = eval(Objec.expr.value)
}
//-->
</SCRIPT>
</HEAD>
<BODY>
<form name="Calculator">
<pre>
Sum:
<BR><input type="text" name="expr" size="20">
End Product:
<input type="text" name="domesum" size="20">
<input type="button" name="B1"
value=" Calculate "
onClick="Oblicz(this.form)"
</pre>
</form>
</script>
</center>