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<html>
<head>
<meta http-equiv="x-ua-compatible" content="IE=edge">
<title>Calculator</title>
<link rel="stylesheet" href="style.css">
<link rel="stylesheet" href="common.css">
<link rel="shortcut icon" href="favicon32.ico" size="32x32">
<script>
function charms(){
document.getElementById('charmsbar').style.display='block';
document.getElementById('datetime').style.display='block';
}
function destroycharms() {
document.getElementById('charmsbar').style.display='none';
document.getElementById('datetime').style.display='none';
}
function start(){
document.getElementById('startbutton').style.display='block';
}
function destroystart() {
document.getElementById('startbutton').style.display='none';
}
</script>
</head>
<body>
<script language="javascript" type="text/javascript">
<!-- Begin
function addChar(input, character) {
if(input.value == null || input.value == "0")
input.value = character
else
input.value += character
}
function cos(form) {
form.display.value = Math.cos(form.display.value);}
function sin(form) {
form.display.value = Math.sin(form.display.value);}
function tan(form) {
form.display.value = Math.tan(form.display.value);}
function sqrt(form) {
form.display.value = Math.sqrt(form.display.value);}
function ln(form) {
form.display.value = Math.log(form.display.value);}
function exp(form) {
form.display.value = Math.exp(form.display.value);}
function sqrt(form) {
form.display.value = Math.sqrt(form.display.value);}
function deleteChar(input) {
input.value = input.value.substring(0, input.value.length - 1)
}
function changeSign(input) {
if(input.value.substring(0, 1) == "-")
input.value = input.value.substring(1, input.value.length)
else
input.value = "-" + input.value
}
function compute(form) {
form.display.value = eval(form.display.value)}
function square(form) {
form.display.value = eval(form.display.value) *
eval(form.display.value)}
function checkNum(str) {
for (var i = 0; i < str.length; i++) {
var ch = str.substring(i, i+1)
if (ch < "0" || ch > "9") {
if (ch != "/" && ch != "*" && ch != "+" && ch !=
"-" && ch != "."
&& ch != "(" && ch!= ")") {
alert("invalid entry!")
return false
}
}
}
return true
}
// End -->
</script>
<div id="scientific" align="center">
<table>
<form></form>
<tbody><tr>
<td colspan="6"><input style="width: 400px;" name="display" value="0"></td>
</tr>
<tr>
<td><input style="width: 90px;" value=" exp " onclick="if (checkNum(this.form.display.value)) {
exp(this.form) }" class="actionbutton" type="button"></td>
<td><input value="7" onclick="addChar(this.form.display, '7')" type="button"></td>
<td><input value="8" onclick="addChar(this.form.display, '8')" type="button"></td>
<td><input value="9" onclick="addChar(this.form.display, '9')" type="button"></td>
<td><input style="width: 60px;" value="/ " onclick="addChar(this.form.display, '/')" class="actionbutton" type="button"></td>
</tr>
<tr>
<td><input style="width: 90px;" value=" ln " onclick="if (checkNum(this.form.display.value)) {
ln(this.form) }" class="actionbutton" type="button"></td>
<td><input value="4" onclick="addChar(this.form.display, '4')" type="button"></td>
<td><input value="5" onclick="addChar(this.form.display, '5')" type="button"></td>
<td><input value="6" onclick="addChar(this.form.display, '6')" type="button"></td>
<td><input style="width: 60px;" value="* " onclick="addChar(this.form.display, '*')" class="actionbutton" type="button"></td>
</tr><tr>
<td><input style="width: 90px;" value=" sqrt " onclick="if (checkNum(this.form.display.value)) {
sqrt(this.form) }" class="actionbutton" type="button"></td>
<td><input value="1" onclick="addChar(this.form.display, '1')" type="button"></td>
<td><input value="2" onclick="addChar(this.form.display, '2')" type="button"></td>
<td><input value="3" onclick="addChar(this.form.display, '3')" type="button"></td>
<td><input style="width: 60px;" value="- " onclick="addChar(this.form.display, '-')" class="actionbutton" type="button"></td>
</tr><tr>
<td><input style="width: 90px;" value=" sq " onclick="if (checkNum(this.form.display.value)) {
square(this.form) }" class="actionbutton" type="button"></td>
<td><input value="0" onclick="addChar(this.form.display, '0')" type="button"></td>
<td><input style="width: 56px;" value=" . " onclick="addChar(this.form.display, '.')" class="actionbutton" type="button"></td>
<td><input style="width: 75px;" value="+/-" onclick="changeSign(this.form.display)" class="actionbutton" type="button"></td>
<td><input style="width: 60px;" value="+" onclick="addChar(this.form.display, '+')" class="actionbutton" type="button"></td>
</tr><tr>
<td><input style="width: 90px;" value=" ( " onclick="addChar(this.form.display, '(')" class="actionbutton" type="button"></td>
<td><input style="width: 75px;" value="cos" onclick="if (checkNum(this.form.display.value)) {
cos(this.form) }" class="actionbutton" type="button"></td>
<td><input value="sin" onclick="if (checkNum(this.form.display.value)) {
sin(this.form) }" class="actionbutton" type="button"></td>
<td><input style="width: 75px;" value="tan" onclick="if (checkNum(this.form.display.value)) {
tan(this.form) }" class="actionbutton" type="button"></td>
<td><input style="width: 60px;" value=" ) " onclick="addChar(this.form.display, ')')" class="actionbutton" type="button"></td>
</tr><tr>
<td><input id="deletebutton" value="Clear" onclick="this.form.display.value = 0 " type="button"></td>
<td><input value="<--" onclick="deleteChar(this.form.display)" class="actionbutton" type="button"></td>
<td><input style="width: 70px;" class="resultbutton" value="=" name="enter" onclick="if (checkNum(this.form.display.value)) { compute(this.form) }" type="button"></td>
</tr></tbody></table>
</div>
</body>
</html>
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