JavaScript: Calculator Script

Main Calculator Script Windows Cal

<HEAD><title>JavaScript, java script, javascripts, script, javascript free code!</title>
<style type="text/css">
<!--
body {font-family: helvetica}
p {font-size: 12pt}

.red {color: red}

.blue {color: blue}

-->

</style>

<!-- Begin

var Memory = 0;

var Number1 = "";

var Number2 = "";

var NewNumber = "blank";

var opvalue = "";

function Display(displaynumber) {

document.calculator.answer.value = displaynumber;

}

function MemoryClear() {

Memory = 0;

document.calculator.mem.value = "";

}

function MemoryRecall(answer) {

if(NewNumber != "blank") {

Number2 += answer;

} else {

Number1 = answer;

}

NewNumber = "blank";

Display(answer);

}

function MemorySubtract(answer) {

Memory = Memory - eval(answer);

}

function MemoryAdd(answer) {

Memory = Memory + eval(answer);

document.calculator.mem.value = " M ";

NewNumber = "blank";

}

function ClearCalc() {

Number1 = "";

Number2 = "";

NewNumber = "blank";

Display("");

}

function Backspace(answer) {

answerlength = answer.length;

answer = answer.substring(0, answerlength - 1);

if (Number2 != "") {

Number2 = answer.toString();

Display(Number2);

} else {

Number1 = answer.toString();

Display(Number1);

}

function CECalc() {

Number2 = "";

NewNumber = "yes";

Display("");

}

function CheckNumber(answer) {

if(answer == ".") {

Number = document.calculator.answer.value;

if(Number.indexOf(".") != -1) {

answer = "";

}

if(NewNumber == "yes") {

Number2 += answer;

Display(Number2);

}

else {

if(NewNumber == "blank") {

Number1 = answer;

Number2 = "";

NewNumber = "no";

}

else {

Number1 += answer;

}

Display(Number1);

}

function AddButton(x) {

if(x == 1) EqualButton();

if(Number2 != "") {

Number1 = parseFloat(Number1) + parseFloat(Number2);

}

NewNumber = "yes";

opvalue = '+';

Display(Number1);

}

function SubButton(x) {

if(x == 1) EqualButton();

if(Number2 != "") {

Number1 = parseFloat(Number1) - parseFloat(Number2);

}

NewNumber = "yes";

opvalue = '-';

Display(Number1);

}

function MultButton(x) {

if(x == 1) EqualButton();

if(Number2 != "") {

Number1 = parseFloat(Number1) * parseFloat(Number2);

}

NewNumber = "yes";

opvalue = '*';

Display(Number1);

}

function DivButton(x) {

if(x == 1) EqualButton();

if(Number2 != "") {

Number1 = parseFloat(Number1) / parseFloat(Number2);

}

NewNumber = "yes";

opvalue = '/';

Display(Number1);

}

function SqrtButton() {

Number1 = Math.sqrt(Number1);

NewNumber = "blank";

Display(Number1);

}

function PercentButton() {

if(NewNumber != "blank") {

Number2 *= .01;

NewNumber = "blank";

Display(Number2);

}

function RecipButton() {

Number1 = 1/Number1;

NewNumber = "blank";

Display(Number1);

}

function NegateButton() {

Number1 = parseFloat(-Number1);

NewNumber = "no";

Display(Number1);

}

function EqualButton() {

if(opvalue == '+') AddButton(0);

if(opvalue == '-') SubButton(0);

if(opvalue == '*') MultButton(0);

if(opvalue == '/') DivButton(0);

Number2 = "";

opvalue = "";

}

//  End -->

</script>

</HEAD>

<BODY>

<tr><td bgcolor="#000080"><b style="color:white">Calculator</b></td></tr>

</td></tr>

</table>

</td></tr>

</tr>

</table>

</td></tr>

</table>

</td></tr>

</table>

</td></tr>

</table>

</form>

</center>

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</center><p>

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