Untitled


<html>

	    <head>

		    <meta name="group" content="116">
			<meta name="author" content="Michaela Stenljung" "Jakob Hoverbrant">

		    <title>Weekday Calculator</title>
			<style>

			body {
			background-color: #f5f5f5;    border-style: outset;
			}

			h1 {
			font-size: 275%;    color: #171769;    padding: 8px 5px;    text-shadow: 1px 1px #009999;    font-family: "palatino linotype"
			}

			table {
			font-size: 20px;    padding: 20px 14px;    width: 400px;    border-style: inset;    border-radius: 23px;
			box-shadow: 10px 10px 5px #a9a9a9;    empty-cells: hide;
			}

			td {
			color: midnightblue;    text-shadow: 1px 1px #009999;    font-family: georgia
			}

			p {
			color: #4682b4;    font-size: 18px;    font-family: "palatino linotype"
			}


			</style>

	    </head>

    <body>


		    <h1>Weekday Calculator</h1>


	<form id="timeForm">

		<table>


		    <tr>
		          <td>Year:</td>
				  <td width="87%"><input type="text"  id="year"  value=""   size="4"></td>
			</tr>

            <tr>
                   <td>Month:</td>
                   <td><input type="text"   id="month"      value=""    size="4"></td>
		    </tr>

            <tr>
                   <td>Day:</td>
                   <td><input type="text"    id="day"   value=""    size="4"></td>
			</tr>

			<tr>
			       <td></td>
		    </tr>

			<tr>
				   <td></td>
			</tr>

			<tr>
			        <td>&nbsp;</td>
					<td><input type="button"  id="button"   value="Calculate"   onclick="handleInput(this.form);" ></td>
		    </tr>


		</table>

	</form>

             <br>

	<p id="output"></p>


		<script language="Javascript">

function handleInput(form) {
		try {
			var strYear = form.year.value;
			var strMonth = form.month.value;
			var strDay = form.day.value;

            var intYear = parseInt(strYear);
            var intMonth = parseInt(strMonth);
            var intDay = parseInt(strDay);

			var h = ((intDay) + Math.floor(13 * ((intMonth) + 1) / 5) + (intYear) + Math.floor((intYear)/4) - Math.floor((intYear) / 100) + Math.floor((intYear) / 400)) % 7;
			var WeekDays = ["Saturday", "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday"];
			var output = (WeekDays[h])


		if (isNaN(intYear))
            throw "Incorrect input. Year (" + (strYear) + ") is not a number.";
		if (intYear < 0 || intYear > 9999)
		    throw "Incorrect input. Year (" + (strYear) + ") is out of expected range (0--9999).";

		if (isNaN(intMonth))
		    throw "Incorrect input. Month (" + (strMonth) + ") is not a number.";
        if (intMonth < 1 || intMonth > 12)
		    throw "Incorrect input. Month (" + (strMonth) + ") is out of expected range (1--12).";

		if (isNaN(intDay))
		    throw "Incorrect input. Day (" + (strDay) + ") is not a number.";


		if ((intMonth) == 1, 3, 5, 7, 8, 10, 12 && ((intDay) < 1 || (intDay) > 31))
		   throw "Incorrect input. Day (" + (strDay) + ") is out of expected range (1--31).";

	    if ((intMonth) == 4, 6, 9, 11 && ((intDay) < 1 || (intDay) > 30))
		   throw "Incorrect input. Day (" + (strDay) + ") is out of expected range (1--30).";


		if ((intMonth) == 2) {
    if (((intYear) % 4 == 0 && (intYear) % 100 != 0) || ((intYear) % 400 == 0)) {
	     if ((intDay) < 1 || (intDay) > 29)
    throw "Incorrect input. Day (" + (strDay) + ") is out of expected range (1--29).";
}
    else  {
	     if ((intMonth == 2) && (intDay) < 1 || (intDay) > 28)
	throw "Incorrect input. Day (" + (strDay) + ") is out of expected range (1--28).";
	      }
	}


			if ((intMonth) == 1 || (intMonth)== 2) {
		 intMonth = intMonth + 12;
		 intYear = intYear - 1;
		 }


        document.getElementById("output").innerHTML = "According to the Gregorian calender, this date is a " + output + ".";

           }

		catch (error) {
			document.getElementById("output").innerHTML = "<b> ERROR: </b>" + error;
		}
	}
		</script>


	</body>

</html>