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<!DOCTYPE html>
<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>
<div id="solver">
<h2>Expression solver</h2>
<p>Need to solve an expression ? Just type it in and click "Calculate !" !!</p>
<script language="javascript" type="text/javascript">
<!-- Begin
function calc(form) {
form.result.value=eval(form.expr.value);
}
// End -->
</script>
<form>
<table border=2 cellspacing=1 cellpadding=5>
<tr>
<td align=center>Equation</td>
<td align=center>Result</td>
</tr>
<tr>
<td align=center><input type=text name=expr size=15></td>
<td align=center><input type=text name=result size=15></td>
<td><input type=button value="Calculate!" class="resultbutton" onclick="calc(this.form)"></td>
</tr>
</table>
</form>
</div>
<div id="datediff">
<h2>Date difference</h2>
<script language="javascript" type="text/javascript">
/* Visit http://www.yaldex.com/ for full source code
and get more free JavaScript, CSS and DHTML scripts! */
<!-- Begin
function isValidDate(dateStr) {
// Date validation function courtesty of
// Sandeep V. Tamhankar (stamhankar@hotmail.com) -->
// Checks for the following valid date formats:
// MM/DD/YY MM/DD/YYYY MM-DD-YY MM-DD-YYYY
var datePat = /^(\d{1,2})(\/|-)(\d{1,2})\2(\d{4})$/; // requires 4 digit year
var matchArray = dateStr.match(datePat); // is the format ok?
if (matchArray == null) {
alert(dateStr + " Date is not in a valid format.")
return false;
}
month = matchArray[1]; // parse date into variables
day = matchArray[3];
year = matchArray[4];
if (month < 1 || month > 12) { // check month range
alert("Month must be between 1 and 12.");
return false;
}
if (day < 1 || day > 31) {
alert("Day must be between 1 and 31.");
return false;
}
if ((month==4 || month==6 || month==9 || month==11) && day==31) {
alert("Month "+month+" doesn't have 31 days!")
return false;
}
if (month == 2) { // check for february 29th
var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
if (day>29 || (day==29 && !isleap)) {
alert("February " + year + " doesn't have " + day + " days!");
return false;
}
}
return true;
}
function isValidTime(timeStr) {
// Time validation function courtesty of
// Sandeep V. Tamhankar (stamhankar@hotmail.com) -->
// Checks if time is in HH:MM:SS AM/PM format.
// The seconds and AM/PM are optional.
var timePat = /^(\d{1,2}):(\d{2})(:(\d{2}))?(\s?(AM|am|PM|pm))?$/;
var matchArray = timeStr.match(timePat);
if (matchArray == null) {
alert("Time is not in a valid format.");
return false;
}
hour = matchArray[1];
minute = matchArray[2];
second = matchArray[4];
ampm = matchArray[6];
if (second=="") { second = null; }
if (ampm=="") { ampm = null }
if (hour < 0 || hour > 23) {
alert("Hour must be between 1 and 12. (or 0 and 23 for military time)");
return false;
}
if (hour <= 12 && ampm == null) {
if (confirm("Please indicate which time format you are using. OK = Standard Time, CANCEL = Military Time")) {
alert("You must specify AM or PM.");
return false;
}
}
if (hour > 12 && ampm != null) {
alert("You can't specify AM or PM for military time.");
return false;
}
if (minute < 0 || minute > 59) {
alert ("Minute must be between 0 and 59.");
return false;
}
if (second != null && (second < 0 || second > 59)) {
alert ("Second must be between 0 and 59.");
return false;
}
return true;
}
function dateDiff(dateform) {
date1 = new Date();
date2 = new Date();
diff = new Date();
if (isValidDate(dateform.firstdate.value) && isValidTime(dateform.firsttime.value)) { // Validates first date
date1temp = new Date(dateform.firstdate.value + " " + dateform.firsttime.value);
date1.setTime(date1temp.getTime());
}
else return false; // otherwise exits
if (isValidDate(dateform.seconddate.value) && isValidTime(dateform.secondtime.value)) { // Validates second date
date2temp = new Date(dateform.seconddate.value + " " + dateform.secondtime.value);
date2.setTime(date2temp.getTime());
}
else return false; // otherwise exits
// sets difference date to difference of first date and second date
diff.setTime(Math.abs(date1.getTime() - date2.getTime()));
timediff = diff.getTime();
weeks = Math.floor(timediff / (1000 * 60 * 60 * 24 * 7));
timediff -= weeks * (1000 * 60 * 60 * 24 * 7);
days = Math.floor(timediff / (1000 * 60 * 60 * 24));
timediff -= days * (1000 * 60 * 60 * 24);
hours = Math.floor(timediff / (1000 * 60 * 60));
timediff -= hours * (1000 * 60 * 60);
mins = Math.floor(timediff / (1000 * 60));
timediff -= mins * (1000 * 60);
secs = Math.floor(timediff / 1000);
timediff -= secs * 1000;
dateform.difference.value = weeks + " weeks, " + days + " days, " + hours + " hours, " + mins + " minutes, and " + secs + " seconds";
return false; // form should never submit, returns false
}
// End -->
</script>
<form onSubmit="return dateDiff(this);">
<table>
<tr><td>
<pre>
<h3>First Date: </h3>
Date: <input type="text" name=firstdate value="" size=20 maxlength=10> (MM/DD/YYYY format)
Time: <input type="time" name=firsttime value="" size=20 maxlength=10> (HH:MM:SS format)
<h3>Second Date: </h3>
Date: <input type="text" name=seconddate value="" size=20 maxlength=10> (MM/DD/YYYY format)
Time: <input type="time" name=secondtime value="" size=20 maxlength=10> (HH:MM:SS format)
<div align="center"><input type=submit class="resultbutton" value="Calculate Difference!">
<h3>Date Difference:</h3>
<input type=text name=difference value="" size=30>
</div>
</pre>
</td></tr>
</table>
</form>
</div>
<div id="binaryconvert">
<h2>Binary convertion</h2>
<script language="javascript" type="text/javascript">
<!-- Begin
function toBin(form) {
base = parseInt(form.base.value);
num = parseInt(form.num.value);
form.amount.value = num.toString(base);
}
// End -->
</script>
<form name=numform>
<input type=text name=num size=8> to base
<input type=text name=base size=8 value=2 onBlur="if ((this.value<1)||(this.value>36)){alert('The base must be between 2 and 36.');this.select();this.focus();}">
<input type=button class="resultbutton" value="=" onclick="toBin(this.form)">
<input type=text name=amount size=15>
</form>
</div>
<!-- Circle solver -->
<div id="circlesolver">
<h2>Circle solver</h2>
<p>Enter the circle area, diameter, or circumference and it will solve for the other two!
</p>
<script language="javascript" type="text/javascript">
/* Visit http://www.yaldex.com/ for full source code
and get more free JavaScript, CSS and DHTML scripts! */
<!-- Begin
function circle(form,changed) {
with (Math) {
var area = form.area.value;
var diameter = form.diameter.value;
var circumference = form.circumference.value;
if (changed == "area") {
var radius = sqrt(area / PI);
diameter = 2 * radius;
circumference = PI * diameter;
}
if (changed == "diameter") {
area = PI * (diameter / 2) * (diameter / 2);
circumference = PI * diameter;
}
if (changed == "circumference") {
diameter = circumference / PI;
area = PI * (diameter / 2) * (diameter / 2);
}
form.area.value = area;
form.diameter.value = diameter;
form.circumference.value = circumference;
}
}
var toDegrees = 360 / (Math.PI * 2);
var toRadians = (Math.PI * 2) / 360;
// End -->
</script>
<form method=post>
<table border="5">
<tr>
<td align=center>Area:</td>
<td align=center><input type=text name=area size=20 value=0 onFocus="select()"></td>
<td align=center><input type=button value="Solve Others" onClick="circle(this.form,'area')" class="resultbutton"></td>
</tr>
<tr>
<td align=center>Diameter:</td>
<td align=center><input type=text name=diameter size=20 value=0 onFocus="select()"></td>
<td align=center><input type=button value="Solve Others" onClick="circle(this.form,'diameter')" class="resultbutton"></td>
</tr>
<tr>
<td align=center>Circumference:</td>
<td align=center><input type=text name=circumference size=20 value=0 onFocus="select()"></td>
<td align=center><input type=button value="Solve Others" onClick="circle(this.form,'circumference')" class="resultbutton"></td>
</tr>
</table>
</form>
</div>
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