<script language="JavaScript"> function Ergebnis(FormIndex,ElemIndex) { var x = 0; x = eval(document.forms[FormIndex].elements[ElemIndex].value); document.forms[FormIndex].elements[ElemIndex].value = x; } function Hinzufuegen(FormIndex,ElemIndex,Zeichen) { document.forms[FormIndex].elements[ElemIndex].value = document.forms[FormIndex].elements[ElemIndex].value + Zeichen; } function Sonderfunktion(FormIndex,ElemIndex,Funktion) { if(Funktion == "sqrt") { var x = 0; x = eval(document.forms[FormIndex].elements[ElemIndex].value); document.forms[FormIndex].elements[ElemIndex].value = Math.sqrt(x); } if(Funktion == "pow") { var x = 0; x = eval(document.forms[FormIndex].elements[ElemIndex].value); document.forms[FormIndex].elements[ElemIndex].value = x * x; } if(Funktion == "log") { var x = 0; x = eval(document.forms[FormIndex].elements[ElemIndex].value); document.forms[FormIndex].elements[ElemIndex].value = Math.log(x); } } </script> <form method="post"> <center><table border="10" cellpadding="10"> <tr> <td bgcolor="#C0C0C0"><input type="text" size="30" maxlength="30"> </td> </tr> <tr> <td bgcolor="#008080"><table border="0"> <tr> <td width="50"><input type="button" value=" 7 " onclick="Hinzufuegen(0,0,'7')"> </td> <td width="50"><input type="button" value=" 8 " onclick="Hinzufuegen(0,0,'8')"> </td> <td width="70"><input type="button" value=" 9 " onclick="Hinzufuegen(0,0,'9')"> </td> <td width="50"><input type="button" value=" + " onclick="Hinzufuegen(0,0,'+')"> </td> </tr> <tr> <td width="50"><input type="button" value=" 4 " onclick="Hinzufuegen(0,0,'4')"> </td> <td width="50"><input type="button" value=" 5 " onclick="Hinzufuegen(0,0,'5')"> </td> <td width="70"><input type="button" value=" 6 " onclick="Hinzufuegen(0,0,'6')"> </td> <td width="50"><input type="button" value=" - " onclick="Hinzufuegen(0,0,'-')"> </td> </tr> <tr> <td width="50"><input type="button" value=" 1 " onclick="Hinzufuegen(0,0,'1')"> </td> <td width="50"><input type="button" value=" 2 " onclick="Hinzufuegen(0,0,'2')"> </td> <td width="70"><input type="button" value=" 3 " onclick="Hinzufuegen(0,0,'3')"> </td> <td width="50"><input type="button" value=" * " onclick="Hinzufuegen(0,0,'*')"> </td> </tr> <tr> <td colspan="2" width="100"><input type="button" value=" = " onclick="Ergebnis(0,0)"> </td> <td width="70"><input type="button" value=" . " onclick="Hinzufuegen(0,0,'.')"> </td> <td width="50"><input type="button" value=" / " onclick="Hinzufuegen(0,0,'/')"> </td> </tr> <tr> <td width="50"><input type="button" value="sqrt " onclick="Sonderfunktion(0,0,'sqrt')"> </td> <td width="50"><input type="button" value=" pow " onclick="Sonderfunktion(0,0,'pow')"> </td> <td width="70"><input type="button" value=" log " onclick="Sonderfunktion(0,0,'log')"> </td> <td width="50"><input type="reset" value=" C "> </td> </tr> </table> </td> </tr> </table> </center> </form>