<center> <form name="Keypad" action=""> <!-- Original: http://www.dummyproof.com/javascripts --> <table> <b> <table border=2 width=50 height=60 cellpadding=1 cellspacing=5> <tr> <td colspan=3 align=middle> <input name="ReadOut2" type="Text" size=24 value="0" width=100%> </TD> <td > </TD> <td> <input name="btnClear" type="Button" value=" C " onClick="Clear()"> </TD> <td> <input name="btnClearEntry" type="Button" value=" CE " onClick="ClearEntry()"> </TD> </TR> <tr> <td> <input name="btnSeven" type="Button" value=" 7 " onClick="NumPressed(7)"> </TD> <td> <input name="btnEight" type="Button" value=" 8 " onClick="NumPressed(8)"> </TD> <td> <input name="btnNine" type="Button" value=" 9 " onClick="NumPressed(9)"> </TD> <td> </TD> <td> <input name="btnNeg" type="Button" value=" +/- " onClick="Neg()"> </TD> <td> <input name="btnPercent" type="Button" value=" % " onClick="Percent()"> </TD> </TR> <tr> <td> <input name="btnFour" type="Button" value=" 4 " onClick="NumPressed(4)"> </TD> <td> <input name="btnFive" type="Button" value=" 5 " onClick="NumPressed(5)"> </TD> <td> <input name="btnSix" type="Button" value=" 6 " onClick="NumPressed(6)"> </TD> <td> </TD> <td align=middle> <input name="btnPlus" type="Button" value=" + " onClick="Operation('+')"> </TD> <td align=middle> <input name="btnMinus" type="Button" value=" - " onClick="Operation('-')"> </TD> </TR> <tr> <td> <input name="btnOne" type="Button" value=" 1 " onClick="NumPressed(1)"> </TD> <td> <input name="btnTwo" type="Button" value=" 2 " onClick="NumPressed(2)"> </TD> <td> <input name="btnThree" type="Button" value=" 3 " onClick="NumPressed(3)"> </TD> <td> </TD> <td align=middle> <input name="btnMultiply" type="Button" value=" * " onClick="Operation('*')"> </TD> <td align=middle> <input name="btnDivide" type="Button" value=" / " onClick="Operation('/')"> </TD> </TR> <tr> <td> <input name="btnZero" type="Button" value=" 0 " onClick="NumPressed(0)"> </TD> <td> <input name="btnDecimal" type="Button" value=" . " onClick="Decimal()"> </TD> <td colspan=3> </TD> <td> <input name="btnEquals" type="Button" value=" = " onClick="Operation('=')"> </TD> </TR> </TABLE> </TABLE> </b> </center> </form> <script language="JavaScript"> <!-- Begin var FKeyPad = document.Keypad; var Accum = 0; var FlagNewNum = false; var PendingOp = ""; function NumPressed (Num) { if (FlagNewNum) { FKeyPad.ReadOut.value = Num; FlagNewNum = false; } else { if (FKeyPad.ReadOut.value == "0") FKeyPad.ReadOut.value = Num; else FKeyPad.ReadOut.value += Num; } } function Operation (Op) { var Readout = FKeyPad.ReadOut.value; if (FlagNewNum && PendingOp != "="); else { FlagNewNum = true; if ( '+' == PendingOp ) Accum += parseFloat(Readout); else if ( '-' == PendingOp ) Accum -= parseFloat(Readout); else if ( '/' == PendingOp ) Accum /= parseFloat(Readout); else if ( '*' == PendingOp ) Accum *= parseFloat(Readout); else Accum = parseFloat(Readout); FKeyPad.ReadOut.value = Accum; PendingOp = Op; } } function Decimal () { var curReadOut = FKeyPad.ReadOut.value; if (FlagNewNum) { curReadOut = "0."; FlagNewNum = false; } else { if (curReadOut.indexOf(".") == -1) curReadOut += "."; } FKeyPad.ReadOut.value = curReadOut; } function ClearEntry () { FKeyPad.ReadOut.value = "0"; FlagNewNum = true; } function Clear () { Accum = 0; PendingOp = ""; ClearEntry(); } function Neg () { FKeyPad.ReadOut.value = parseFloat(FKeyPad.ReadOut.value) * -1; } function Percent () { FKeyPad.ReadOut.value = (parseFloat(FKeyPad.ReadOut.value) / 100) * parseFloat(Accum); } // End --> </script>