/*
 * DMDatePicker.js
 * © Digimaker AS. All rights reserved.
 *
 * Author: Alan (04.02.2004) 
 *
 * Comments:
 * Alan (04.02.2004) Initial code copied from Calendar selector website.  Altered
 * various calls to make it suit our needs.  Some of the functions can probably be
 * pruned
 *
 */

<!-- helper script that uses the calendar -->

var oldLink = null;

// gets rid of data within row when clear button hit
function clearRow (selectedDate,listhours,listminutes){
	document.getElementById(selectedDate).value = "";
	document.getElementById(listhours).selectedIndex = [0];
	document.getElementById(listminutes).selectedIndex = [0];
}

//clear the selected date field.
function clearSelected(selectedDate) {
	document.getElementById(selectedDate).value = "";
}

// code to change the active stylesheet
function setActiveStyleSheet(link, title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
  if (oldLink) oldLink.style.fontWeight = 'normal';
  oldLink = link;
  link.style.fontWeight = 'bold';
  return false;
}

// This function gets called when the end-user clicks on some date.
function selected(cal, date) {
  cal.sel.value = date; // just update the date in the input field.
  if (cal.dateClicked)
    // if we add this call we close the calendar on single-click.
    cal.callCloseHandler();
    
    // Added this function call which pages that use the calendar control can implement.
	// It's important that the pages creates a function called DateClicked, or an error will be thrown.
	try{
		DateClicked();
	}catch(e){
		//alert(e.description + " [ the custom function: DateClicked() ]");
	}
}

// And this gets called when the end-user clicks on the _selected_ date,
// or clicks on the "Close" button.  It just hides the calendar without
// destroying it.
function closeHandler(cal) {
  cal.hide();                        // hide the calendar
  cal.destroy();
  calendar = null;
}

// This function shows the calendar under the element having the given id.
// It takes care of catching "mousedown" signals on document and hiding the
// calendar if the click was outside.
function showCalendar(id, format, showsTime, controlName) {	
  var el;
  // Bharat - 05.07.07
  // If controlName is not specified than calender is clicked from other modules than eForm
  // use its id to get correct element.
  // If called from eForm pages, than use controlName which has correct name in case of multipage eForm.
  //el = document.getElementById(id);
  if(controlName == null)
  {
	el = document.getElementById(id);
  }
  else
  {
	var elems = document.getElementsByName(controlName);
	if(elems.length >0)
		el = elems[0];
  }
  if (calendar != null) {
    // we already have some calendar created
    calendar.hide();                 // so we hide it first.
  } else {
    // first-time call, create the calendar.
    var cal = new Calendar(true, null, selected, closeHandler);    
    
    // uncomment the following line to hide the week numbers
    // cal.weekNumbers = false;
    if (typeof showsTime == "string") {
      cal.showsTime = true;
      cal.time24 = (showsTime == "24");
    }
    calendar = cal;                  // remember it in the global var
    cal.setRange(1900, 2070);        // min/max year allowed.
    cal.create();
  }
  calendar.setDateFormat(format);    // set the specified date format
  calendar.parseDate(el.value);      // try to parse the text in field
  calendar.sel = el;                 // inform it what input field we use

  // the reference element that we pass to showAtElement is the button that
  // triggers the calendar.  In this example we align the calendar bottom-right
  // to the button.
  calendar.showAtElement(el.nextSibling, "BR");        // show the calendar
  //calendar.showAt(200, 100);
  return false;
}

var MINUTE = 60 * 1000;
var HOUR = 60 * MINUTE;
var DAY = 24 * HOUR;
var WEEK = 7 * DAY;

// If this handler returns true then the "date" given as
// parameter will be disabled.  In this example we enable
// only days within a range of 10 days from the current
// date.
// You can use the functions date.getFullYear() -- returns the year
// as 4 digit number, date.getMonth() -- returns the month as 0..11,
// and date.getDate() -- returns the date of the month as 1..31, to
// make heavy calculations here.  However, beware that this function
// should be very fast, as it is called for each day in a month when
// the calendar is (re)constructed.
function isDisabled(date) {
  var today = new Date();
  return (Math.abs(date.getTime() - today.getTime()) / DAY) > 10;
}

function flatSelected(cal, date) {
  var el = document.getElementById("preview");
  el.innerHTML = date;
}

function showFlatCalendar() {
  var parent = document.getElementById("display");

  // construct a calendar giving only the "selected" handler.
  var cal = new Calendar(true, null, flatSelected);

  // hide week numbers
  cal.weekNumbers = false;

  // We want some dates to be disabled; see function isDisabled above
  cal.setDisabledHandler(isDisabled);
  cal.setDateFormat("%A, %B %e");

  // this call must be the last as it might use data initialized above; if
  // we specify a parent, as opposite to the "showCalendar" function above,
  // then we create a flat calendar -- not popup.  Hidden, though, but...
  cal.create(parent);

  // ... we can show it here.
  cal.show();
}