function createDate(dateParts) {
var theDate = new Date(parseInt(dateParts[2],10), parseInt(dateParts[0],10), parseInt(dateParts[1],10) );
return theDate;
}
function getYear(now) {
//This function, and the reasoning behind it, was obtained at http://www.quirksmode.org/js/date.html.
var x = now.getYear();
var y = x % 100;
y += (y < 38) ? 2000 : 1900;
return y;
}
function getMonth(now) {
var months = new Array('January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December');
return months[now.getMonth()];
}
function getDaysRow() {
var daysOfTheWeek = new Array('S','M','T', 'W', 'T', 'F', 'S');
var html = '';
html += '
\n';
for (var i = 0; i < daysOfTheWeek.length; i++) {
html += '
' + daysOfTheWeek[i] + '
\n';
}
html += '
\n';
return html;
}
function getCalendarBody(now, dateParts, dtStartDate, dtEndDate) {
//An array corresponding to the number of days in each month. Note alteration on daysInMonth[1], February, if a leap year.
var daysInMonth = new Array('31','28','31','30','31','30','31','31','30','31','30','31');
if ( ( (getYear(now) % 4 == 0) && (getYear(now) % 100 != 0) ) || (getYear(now) % 400 == 0) ) {
daysInMonth[1] = 29;
}
var calendarDays = new Array(); //Set blank array of possible date slots.
var firstDay = new Date(getYear(now), now.getMonth(), 1); //Create a date object corresponding to the first day of the month.
var lastDay = new Date(getYear(now), now.getMonth(), daysInMonth[now.getMonth()]); //Create a date object corresponding to the last day of the month (technically, the day before the first day of the next month).
firstDay = firstDay.getDay(); //Should now equal the day of the week for use as an offset when populating the calendarDays array.
lastDay = lastDay.getDate(); //Should now equal 28, 29, 30, or 31.
//Get number of rows to be displayed.
var weekRows = 6 - (Math.floor( ((42 - ((firstDay) + lastDay)) / 7) ) ); //Up to six weeks and 42 days, depending on the calendar.
//Clear the calendarDays array.
for (var i = 1; i <= 42; i++) {
calendarDays[i] = '';
}
//Populate the calendarDays array, offsetting for the day of the week corresponding to the first day of the month.
for (var i = 1; i <= lastDay; i++) {
calendarDays[firstDay + i] = i; //And here's the offset.
}
//Build the actual calendar output.
var html = '';
for (var i = 1; i <= weekRows; i++) {
html += '
\n';
for (var j = 1; j <= 7; j++) {
if (calendarDays[((i - 1) * 7) + j] == '') {
html += '
\n';
} else {
dateParts[1] = calendarDays[((i - 1) * 7) + j];
var dtCurrentDate = createDate(dateParts);
if (dtCurrentDate >= dtStartDate && dtCurrentDate <= dtEndDate) {
html += '
' + calendarDays[((i - 1) * 7) + j] + '
\n';
} else {
html += '
' + calendarDays[((i - 1) * 7) + j] + '
\n';
}
}
}
html += '
\n'
}
return html;
}
function showCalendar(simname, level, simnum, startDate, endDate) { //Receive startDate and endDate as strings with format mm/dd/yyyy.
//Create date objects corresponding to startDate and endDate.
var startDateParts = startDate.split('/');
for (var i = 0; i < startDateParts.length; i++) {
startDateParts[i] = parseInt(startDateParts[i],10);
}
var endDateParts = endDate.split('/');
for (var i = 0; i < endDateParts.length; i++) {
endDateParts[i] = parseInt(endDateParts[i],10);
}
startDateParts[0] = startDateParts[0] - 1;
var startMonth = startDateParts[0];
endDateParts[0] = endDateParts[0] - 1;
var endMonth = endDateParts[0];
var dtStartDate = createDate(startDateParts);
var dtEndDate = createDate(endDateParts);
//Begin html output.
var html = '';
html += '\n';
html += '\n';
html += '' + simname + '\n';
html += '\n';
html += '\n';
html += '\n';
html += '
\n';
if (dtStartDate.getMonth() != dtEndDate.getMonth()) { //This will do for now. If we were including the year(s) in the date string, We'd send dtStartDate and dtEndDate to a separate function for tests and proper formatting.
html += '
Areas highlighted in pink indicate simulation days.
\n';
//Loop through months to display.
for (var i = startMonth; i <= endMonth; i++) {
var dateParts = startDate.split('/');
dateParts[0] = i;
var now = new Date( parseInt(dateParts[2],10), parseInt(dateParts[0],10), 1 ); //Date specified by user.
html += '
\n';
html += '\n';
html += '
\n';
html += '
' + getMonth(now) + ' ' + getYear(now) + '
\n';
html += '
\n';
html += '\n';
html += '\n';
html += getDaysRow();
html += getCalendarBody(now, dateParts, dtStartDate, dtEndDate);
html += '\n';
html += '
\n';
html += ' \n';
}
html += '\n';
html += '\n';
var newWin = window.open('','','width=350,height=525,resizable,scrollbars,screenX=25,screenY=25,left=25,top=25');
newWin.document.open();
newWin.document.write(html);
newWin.document.close();
}