Need Basic Javascript Help

[timithyy]

Hi guys I'm just a beginner at javascript/html. I'm trying to finish off this calculator and am having troubles adding the division and multiply signs in (and making them functional), if someone could show me how to do that it would be much appreciated

<!DOCTYPE html>
<CENTER>
 <FORM name="Keypad" action="">
  <TABLE>
  <B>
  <TABLE border=2 width=50 height=60 cellpadding=1 cellspacing=5>
   <TR>
      <TD colspan=3 align=middle>
         <input name="ReadOut" type="Text" size=24 value="0" width=100%>
      <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="">
     </TD>
     <TD align=middle><input name="btnDivide" type="Button" value="       " onclick="">
     </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>
  </FORM>
</CENTER>
<font face="Verdana, Arial, Helvetica" size=2>

<SCRIPT LANGUAGE="JavaScript">
   <!-- Begin
      var FKeyPad = document.Keypad;
      var Accumulate = 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 )
                   Accumulate += parseFloat(Readout);
                else if ( '-' == PendingOp )
                        Accumulate -= parseFloat(Readout);
                else
                    Accumulate = parseFloat(Readout);
                 FKeyPad.ReadOut.value = Accumulate;
                 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 () {
            Accumulate = 0;
            PendingOp = "";
            ClearEntry();
      }

	  
	  function Neg () {
            FKeyPad.ReadOut.value = "###";
      }

	  
	  function Percent () {
           FKeyPad.ReadOut.value = (parseFloat(FKeyPad.ReadOut.value) / 100) * parseFloat(Accumulate);
}
// End -->
</SCRIPT>

 

[SuF]

What issues are you having specifically?

 

[timithyy]

What issues are you having specifically?

Making the multiply and division buttons work. Getting the symbols * and / on the calculator itself I can do, I just need them to work.

 

[timithyy]

bump.. anyone?

 

[Blupig]

*= and /* are both valid operators (similar to += and -=). You just add the operations as you've already done for + and -.