📄 counter.htm

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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>计算器</title>
<style type="text/css">
BODY {FONT-SIZE: 9pt; FONT-FAMILY: "宋体"}
TD {FONT-SIZE: 9pt; FONT-FAMILY: "宋体"}
INPUT {FONT-SIZE:9PT;FONT-FAMILY:"宋体";width:40}
.INP {FONT-SIZE:9PT;FONT-FAMILY:"宋体";width:85}
</style></head>

<body bgcolor="menu" style="border:0;margin:5" onkeydown='if((event.ctrlKey)||(event.keyCode==116)){event.keyCode=0;return false}'>
<form name="Keypad" action>
          <table width="100%" height="100%" border="0" cellPadding="0" cellSpacing="0">
              <tr align="center"> 
                <td colSpan="6"><input value="0" name="ReadOut"style="width:266"></td>
              </tr>
              <tr align="center"> 
                <td> 
                    <input onclick="NumPressed(7)" type="button" value="  7  " name="btnSeven">
                  </td>
                <td> 
                    <input onclick="NumPressed(8)" type="button" value="  8  " name="btnEight">
                  </td>
                <td> 
                    <input onclick="NumPressed(9)" type="button" value="  9  " name="btnNine">
                  </td>
                <td> 
                    <input onclick="hexchange()" type="button" value="HEX" name="btnHex">
                  </td>
                <td> 
                    <input onClick="Clear()" type="button" value="  C  " name="btnClear">
                  </td>
                <td>
                    <input onClick="ClearEntry()" type="button" value=" CE  " name="btnClearEntry2">
                  </td>
              </tr>
              <tr align="center"> 
                <td> 
                    <input onclick="NumPressed(4)" type="button" value="  4  " name="btnFour">
                  </td>
                <td> 
                    <input onclick="NumPressed(5)" type="button" value="  5  " name="btnFive">
                  </td>
                <td> 
                    <input onclick="NumPressed(6)" type="button" value="  6  " name="btnSix">
                  </td>
                <td>
                    <input onclick="octchange()" type="button" value="OCT" name="btnClearEntry222">
                  </td>
                <td>
                    <input onClick="Neg()" type="button" value=" +/- " name="btnNeg">
                  </td>
                <td>
                    <input onClick="Percent()" type="button" value="  %  " name="btnPercent">
                  </td>
              </tr>
              <tr align="center"> 
                <td> 
                    <input onclick="NumPressed(1)" type="button" value="  1  " name="btnOne">
                  </td>
                <td> 
                    <input onclick="NumPressed(2)" type="button" value="  2  " name="btnTwo">
                  </td>
                <td> 
                    <input onclick="NumPressed(3)" type="button" value="  3  " name="btnThree">
                  </td>
                <td>
                    <input onclick="binchange()" type="button" value="BIN" name="btnClearEntry223">
                  </td>
                <td>
                    <input onClick="Operation('+')" type="button" value="  +  " name="btnPlus">
                  </td>
                <td>
                    <input onClick="Operation('-')" type="button" value="  -  " name="btnMinus">
                  </td>
              </tr>
              <tr align="center"> 
                <td> 
                    <input onclick="NumPressed(0)" type="button" value="　0　" name="btnZero">
                  </td>
                <td> 
                    <input onclick="Decimal()" type="button" value="　.　" name="btnDecimal">
                  </td>
                <td colSpan="2">
                    <input class=inp onclick="Operation('=')" type="button" value="    =    " name="btnEquals">
                  </td>
                <td> 
                    <input onClick="Operation('*')" type="button" value="　*　" name="btnMultiply">
                  </td>
                <td>
                    <input onClick="Operation('/')" type="button" value="　/　" name="btnDivide">
</table>
</form>
  <script language="JavaScript">
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);
}
function hexchange()
{
var hex,dec;
dec = parseFloat(FKeyPad.ReadOut.value);
hex = dec.toString(16);
window.alert("该十进制数转成十六进制数为："+ hex);
}
function octchange()
{
var oct,dec;
dec = parseFloat(FKeyPad.ReadOut.value);
oct = dec.toString(8);
window.alert("该十进制数转成八进制数为："+ oct);
}
function binchange()
{
var bin,dec;
dec = parseFloat(FKeyPad.ReadOut.value);
bin = dec.toString(2);
window.alert("该十进制数转成二进制数为："+ bin);
}
</script>
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