&#106avascript计算器

&#106avascript计算器(5)    }
 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 '-' == PendingOp '/' == PendingOp '*' == PendingOp)
   Accum = longCount(Accum,Readout,PendingOp);
  else
   Accum = Readout;
        FKeyPad.ReadOut.value = Accum;
        PendingOp = Op;
        FKeyPad.ReadOut.focus();
        FKeyPad.ReadOut.select();
 }
}
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 () {
    alert(FKeyPad.ReadOut.value);
 FKeyPad.ReadOut.value = longCount(FKeyPad.ReadOut.value,"-1","*");
}
function Percent () {
 FKeyPad.ReadOut.value = longCount(FKeyPad.ReadOut.value,Accum,"*");
 FKeyPad.ReadOut.value = longCount(FKeyPad.ReadOut.value,100,"/");
}
function goReturn() {
    top.returnValue = FKeyPad.ReadOut.value;
    self.close();
}
function CheckOut() {
    var keyCode = window.event.keyCode;