JoeGarrepy.com Java Script Calculator

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This disclaimer is intended to cover all software/freeware, and other various files which are downloadable through or from this site.
Joe Garrepy, isp, and web host can not be held responsible for any software downloaded from this site. All freeware is downloaded at your own risk. Software which is listed on this site is assumed to work properly, but may or may not have different effects on different computer systems. The same rules apply to these programs. Joe Garrepy assumes no responsibility for those unusual occurrences where software has adverse effects on users computer. Joe Garrepy does not warrant these programs/files, and as such, can offer no guidelines in which to use them. All freeware/software/files, trademarks, service marks, and copyrights are acknowledged as belonging to their owners. Any of these which the owner wishes to be removed will be done so immediately. By downloading any software or viewing pages in which software can be downloaded, you agree to be bound to this agreement.

JoeGarrepy.com Java Script Calculator

A simple Java Script calculator that uses arrays to store and process consecutive calculations like a real calculator (you can enter 9 + 3 - 2 * 11 press = and get 110).

Java Script Portion

  <! *** Original by Joe Garrepy (doughjoe77@hotmail.com) ***>
  <SCRIPT LANGUAGE="JavaScript">
    var enteredNumbers=new Array();
    var intEntered=0;
    var enteredCalc=new Array();
    var intCalc=0;
    var intTypeOver=0;
    var numMem;
    function f_upd_disp(in_field,in_val)
    {
      if (in_field.value=="0")
      {
        in_field.value = "";
      }
      if (intTypeOver==0)
      {
        in_field.value += in_val;
      }
      else
      {
        in_field.value = in_val;
        intTypeOver=0;
      }
    }
    function f_clear_display(in_field,in_type)
    {
      in_field.value = "0";
      if (in_type=="ALL")
      {
        intEntered=0;
        intCalc=0;
        intTypeOver=0;
      }
    }
    function f_stor_mem(in_field)
    {
      numMem = in_field.value;
    }
    function f_clear_mem()
    {
      numMem = "";
    }
    function f_disp_mem(in_field)
    {
      f_upd_disp(in_field,numMem);
    }
    function f_backspace(in_field)
    {
      in_field.value = in_field.value.substr(0,in_field.value.length - 1);
    }
    function f_plus_minus(in_field)
    {
      in_field.value = eval(in_field.value) * -1;
    }
    function f_stor(in_type,in_field,in_value)
    {
      if (in_type == "VALUE")
      {
        enteredNumbers[intEntered] = in_field.value;
        intEntered++;
      }
      if (in_type == "CALC")
      {
        enteredCalc[intCalc] = in_value;
        intCalc++;
      }
      //in_field.value = "0";
      intTypeOver=1;
    }
    function f_sqrt(in_field)
    {
      in_field.value = Math.sqrt(eval(in_field.value));
      intEntered=0;
      intCalc=0;
      intTypeOver=1;
    }
    function f_calc(in_field)
    {
      var j=0;
      var numOddEven=1;
      var numPrevValue;
      var numNewValue;
      var numCurValue=0;
      var strCalc;
      for(var i = 0; i < intEntered; i++)
      {
        if (numOddEven!=3)
        {
          if (numOddEven==1)
          {
            numPrevValue = enteredNumbers[i];
            numOddEven = 2;
          }
          else
          {
            numNewValue =  enteredNumbers[i];
            numOddEven = 3;
          }
        }
        else
        {
          numPrevValue = numCurValue;
          numNewValue = enteredNumbers[i];
        }
        if (numOddEven==3)
        {
          switch (enteredCalc[j])
          {
            case "+" :
              numCurValue = eval(numPrevValue) + eval(numNewValue);
              break;
            case "-" :
              numCurValue = eval(numPrevValue) - eval(numNewValue);
              break;
            case "*" :
              numCurValue = eval(numPrevValue) * eval(numNewValue);
              break;
            case "/" :
              numCurValue = eval(numPrevValue) / eval(numNewValue);
              break;
            default :
              numCurValue = 0;
              break;
          }
          j++;
        }
      }
      intEntered=0;
      intCalc=0;
      intTypeOver=1;
      in_field.value = numCurValue;
    }
  </SCRIPT>

Html Portion

  <FORM NAME="frm_j_calc">
  <table border="1">
  <tr>
  <td>
    <TABLE BORDER="3">
      <TR>
        <TD><INPUT TYPE="Text" NAME="txt_calc_display" VALUE="0" ALIGN="LEFT" SIZE="25"></TD>
      </TR>
    </TABLE>
    <TABLE>
      <TR>
        <TD><INPUT TYPE="Button" NAME="btn_backspace" VALUE="Backspace" onClick="f_backspace(this.form.txt_calc_display);"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_ce" VALUE="CE" onClick="f_clear_display(this.form.txt_calc_display,'ALL');"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_c" VALUE="C" onClick="f_clear_display(this.form.txt_calc_display);"></TD>
      </TR>
    </TABLE>
    <TABLE CELLSPACING="1" CELLPADDING="1">
      <TR>
        <TD><INPUT TYPE="Button" NAME="btn_mc" style="width:28" VALUE="MC" onClick="f_clear_mem();"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_7" style="width:28" VALUE="7" onClick="f_upd_disp(this.form.txt_calc_display,'7');"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_8" style="width:28" VALUE="8" onClick="f_upd_disp(this.form.txt_calc_display,'8');"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_9" style="width:28" VALUE="9" onClick="f_upd_disp(this.form.txt_calc_display,'9')"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_divide" style="width:28" VALUE="/" onClick="f_stor('VALUE',this.form.txt_calc_display,''); f_stor('CALC',this.form.txt_calc_display,'/');"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_sqrt" style="width:28" VALUE="sqrt" onClick="f_sqrt(this.form.txt_calc_display);"></TD>
      </TR>
      <TR>
        <TD><INPUT TYPE="Button" NAME="btn_mr" style="width:28" VALUE="MR" onClick="f_disp_mem(this.form.txt_calc_display);"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_4" style="width:28" VALUE="4" onClick="f_upd_disp(this.form.txt_calc_display,'4')"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_5" style="width:28" VALUE="5" onClick="f_upd_disp(this.form.txt_calc_display,'5')"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_6" style="width:28" VALUE="6" onClick="f_upd_disp(this.form.txt_calc_display,'6')"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_mult" style="width:28" VALUE="*" onClick="f_stor('VALUE',this.form.txt_calc_display,''); f_stor('CALC',this.form.txt_calc_display,'*');;"></TD>
        <TD></TD>
      </TR>
      <TR>
        <TD><INPUT TYPE="Button" NAME="btn_ms" style="width:28" VALUE="MS" onClick="f_stor_mem(this.form.txt_calc_display);"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_1" style="width:28" VALUE="1" onClick="f_upd_disp(this.form.txt_calc_display,'1')"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_2" style="width:28" VALUE="2" onClick="f_upd_disp(this.form.txt_calc_display,'2')"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_3" style="width:28" VALUE="3" onClick="f_upd_disp(this.form.txt_calc_display,'3')"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_min" style="width:28" VALUE="-" onClick="f_stor('VALUE',this.form.txt_calc_display,''); f_stor('CALC',this.form.txt_calc_display,'-');"></TD>
        <TD></TD>
      </TR>
      <TR>
        <TD></TD>
        <TD><INPUT TYPE="Button" NAME="btn_0" style="width:28" VALUE="0" onClick="f_upd_disp(this.form.txt_calc_display,'0')"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_plus_minus" style="width:28" VALUE="+/-" onClick="f_plus_minus(this.form.txt_calc_display);"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_period" style="width:28" VALUE="." onClick="f_upd_disp(this.form.txt_calc_display,'.');"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_plus" style="width:28" VALUE="+" onClick="f_stor('VALUE',this.form.txt_calc_display,''); f_stor('CALC',this.form.txt_calc_display,'+');"></TD>
        <TD><INPUT TYPE="Button" NAME="btn_equals" style="width:28" VALUE="=" onClick="f_stor('VALUE',this.form.txt_calc_display,''); f_calc(this.form.txt_calc_display);"></TD>
      </TR>
    </TABLE>
  </FORM>
  </td>
  </tr>
  </table>

If you find any bugs or want to contact me I can be reached @ doughjoe77@hotmail.com.