Descrição: O abaixo é gerado JavaScript calculadora

Exemplo:

This free script provided by
JavaScript
Kit

<form NAME="Calc"><table BORDER=4><tr> <td><br /> <input TYPE="text" NAME="Input" Size="16"><br /> </TD> </TR> <tr> <td><br /> <input TYPE="button" NAME="one" VALUE=" 1 " OnClick="Calc.Input.value += '1'"><br /> <input TYPE="button" NAME="two" VALUE=" 2 " OnCLick="Calc.Input.value += '2'"><br /> <input TYPE="button" NAME="three" VALUE=" 3 " OnClick="Calc.Input.value += '3'"><br /> <input TYPE="button" NAME="plus" VALUE=" + " OnClick="Calc.Input.value += ' + '"><br /> <input TYPE="button" NAME="four" VALUE=" 4 " OnClick="Calc.Input.value += '4'"><br /> <input TYPE="button" NAME="five" VALUE=" 5 " OnCLick="Calc.Input.value += '5'"><br /> <input TYPE="button" NAME="six" VALUE=" 6 " OnClick="Calc.Input.value += '6'"><br /> <input TYPE="button" NAME="minus" VALUE=" - " OnClick="Calc.Input.value += ' - '"><br /> <input TYPE="button" NAME="seven" VALUE=" 7 " OnClick="Calc.Input.value += '7'"><br /> <input TYPE="button" NAME="eight" VALUE=" 8 " OnCLick="Calc.Input.value += '8'"><br /> <input TYPE="button" NAME="nine" VALUE=" 9 " OnClick="Calc.Input.value += '9'"><br /> <input TYPE="button" NAME="times" VALUE=" x " OnClick="Calc.Input.value += ' * '"><br /> <input TYPE="button" NAME="clear" VALUE=" c " OnClick="Calc.Input.value = ''"><br /> <input TYPE="button" NAME="zero" VALUE=" 0 " OnClick="Calc.Input.value += '0'"><br /> <input TYPE="button" NAME="DoIt" VALUE=" = " OnClick="Calc.Input.value = eval(Calc.Input.value)"><br /> <input TYPE="button" NAME="div" VALUE=" / " OnClick="Calc.Input.value += ' / '"><br /> </TD> </TR> </TABLE></FORM><p align="center"><font face="arial" size="-2">This free script provided by</font><br /> <font face="arial, helvetica" size="-2"><a href="http://javascriptkit.com">JavaScript<br /> Kit</a></font></p>