Calculadora Para Tu Web

<form  action name="Keypad"> <b> <div align="center"> <table  border="2" cellpadding="1" cellspacing="5" height="60" width="50">  <tbody> <tr> <td align="middle" colspan="3"><input  name="ReadOut" size="24" value="0" width="100%" style="text-align:  right" /></td> <td> </td> <td  align="center"><input name="btnClear" onclick="Clear()"  type="button" value=" C " /></td> <td  align="center"><input name="btnClearEntry" onclick="ClearEntry()"  type="button" value=" CE " /></td> </tr> <tr>  <td align="center"><input name="btnSeven"  onclick="NumPressed(7)" type="button" value=" 7 " /></td>  <td align="center"><input name="btnEight"  onclick="NumPressed(8)" type="button" value=" 8 " /></td>  <td align="center"><input name="btnNine"  onclick="NumPressed(9)" type="button" value=" 9 " /></td>  <td align="center"> </td> <td  align="center"><input name="btnNeg" onclick="Neg()" type="button"  value=" +/- " /></td> <td align="center"><input  name="btnPercent" onclick="Percent()" type="button" value=" % "  /></td> </tr> <tr> <td  align="center"><input name="btnFour" onclick="NumPressed(4)"  type="button" value=" 4 " /></td> <td  align="center"><input name="btnFive" onclick="NumPressed(5)"  type="button" value=" 5 " /></td> <td  align="center"><input name="btnSix" onclick="NumPressed(6)"  type="button" value=" 6 " /></td> <td align="center">  </td> <td align="center"><input name="btnPlus"  onclick="Operation('+')" type="button" value=" + " /></td>  <td align="center"><input name="btnMinus"  onclick="Operation('-')" type="button" value=" - " /></td>  </tr> <tr> <td align="center"><input name="btnOne"  onclick="NumPressed(1)" type="button" value=" 1 " /></td>  <td align="center"><input name="btnTwo"  onclick="NumPressed(2)" type="button" value=" 2 " /></td>  <td align="center"><input name="btnThree"  onclick="NumPressed(3)" type="button" value=" 3 " /></td>  <td align="center"> </td> <td  align="center"><input name="btnMultiply" onclick="Operation('*')"  type="button" value=" * " /></td> <td  align="center"><input name="btnDivide" onclick="Operation('/')"  type="button" value=" / " /></td> </tr> <tr>  <td align="center"><input name="btnZero"  onclick="NumPressed(0)" type="button" value=" 0 " /></td>  <td align="center"><input name="btnDecimal"  onclick="Decimal()" type="button" value=" . " /></td> <td  colspan="3" align="center"> </td> <td  align="center"><input name="btnEquals" onclick="Operation('=')"  type="button" value=" = " /></td> </tr> </tbody>  </table> </div> </b> </form> <script  language="JavaScript"> <!-- modifica este script para tu uso  --> <!-- puedes cambiar tamaño y color de botones y fondo -->  <!-- 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>

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