var oldLink = null;
// 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 && (cal.sel.id == "sel1" || cal.sel.id == "sel3"))
    // if we add this call we close the calendar on single-click.
    // just to exemplify both cases, we are using this only for the 1st
    // and the 3rd field, while 2nd and 4th will still require double-click.
    cal.callCloseHandler();
}

// 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();
  _dynarch_popupCalendar = 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, showsOtherMonths) {
  var el = document.getElementById(id);
  if (_dynarch_popupCalendar != null) {
    // we already have some calendar created
    _dynarch_popupCalendar.hide();                 // so we hide it first.
  } else {
    // first-time call, create the calendar.
    var cal = new Calendar(1, 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");
    }
    if (showsOtherMonths) {
      cal.showsOtherMonths = true;
    }
    _dynarch_popupCalendar = cal;                  // remember it in the global var
    cal.setRange(1900, 2070);        // min/max year allowed.
    cal.create();
  }
  _dynarch_popupCalendar.setDateFormat(format);    // set the specified date format
  _dynarch_popupCalendar.parseDate(el.value);      // try to parse the text in field
  _dynarch_popupCalendar.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.
  _dynarch_popupCalendar.showAtElement(el.nextSibling, "Br");        // show the calendar

  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) > 1000000;
}

function flatSelected(cal, date) {
  var el = document.getElementById("preview");
  el.innerHTML = date;
  
  var tarihi1 = date;
  var tarihi2 = eval(form).tarihilk.value;
  
  var xsekiz = eval(form).hsekiz.value;
  var xdokuz = eval(form).hdokuz.value;
  var xon = eval(form).hon.value;
  var xonbir = eval(form).honbir.value;
  var xoniki = eval(form).honiki.value;
  var xonuc = eval(form).honuc.value;
  var xondort = eval(form).hondort.value;
  var xonbes = eval(form).honbes.value;
  var xonalti = eval(form).honalti.value;
  var xonyedi = eval(form).honyedi.value;
  var xonsekiz = eval(form).honsekiz.value;
  var xondokuz = eval(form).hondokuz.value;
  var xyirmi = eval(form).hyirmi.value;
  var xnotlar = eval(form).hnotlar.value;
  
  if(tarihi1 == tarihi2){
  eval(form).sekiz.value = xsekiz;
  eval(form).dokuz.value = xdokuz;
  eval(form).on.value = xon;
  eval(form).onbir.value = xonbir;
  eval(form).oniki.value = xoniki;
  eval(form).onuc.value = xonuc;
  eval(form).ondort.value = xondort;
  eval(form).onbes.value = xonbes;
  eval(form).onalti.value = xonalti;
  eval(form).onyedi.value = xonyedi;
  eval(form).onsekiz.value = xonsekiz; 
  eval(form).ondokuz.value = xondokuz;
  eval(form).yirmi.value = xyirmi;
  eval(form).notlar.value = xnotlar;
  
  } else {
  
  eval(form).sekiz.value = '';
  eval(form).dokuz.value = '';
  eval(form).on.value = '';
  eval(form).onbir.value = '';
  eval(form).oniki.value = '';
  eval(form).onuc.value = '';
  eval(form).ondort.value = '';
  eval(form).onbes.value = '';
  eval(form).onalti.value = '';
  eval(form).onyedi.value = '';
  eval(form).onsekiz.value = ''; 
  eval(form).ondokuz.value = '';
  eval(form).yirmi.value = '';
  eval(form).notlar.value = '';
  
  }
  eval(form).tarih.value = date;


   
}

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

  // construct a calendar giving only the "selected" handler.
  var cal = new Calendar(0, 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 %Y");

  // 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();
  
}