var datePickerDivID = "datepicker";
var iFrameDivID = "datepickeriframe";

var dayArrayShort = new Array('Pon', 'Wt', 'Śr', 'Czw', 'Pt', 'Sob', 'Ndz');
var dayArrayMed = new Array('Pon', 'Wt', 'Śr', 'Czw', 'Pt', 'Sob', 'Ndz');
var dayArrayLong = new Array('Poniedziałek', 'Wtorek', 'Środa', 'Czwartek', 'Piątek', 'Sobota', 'Niedziela');
var monthArrayShort = new Array('STY', 'LUT', 'MAR', 'KWI', 'MAJ', 'CZE', 'LIP', 'SIE', 'WRZ', 'PAŹ', 'LIS', 'GRU');
var monthArrayMed = new Array('STY', 'LUT', 'MAR', 'KWI', 'MAJ', 'CZE', 'LIP', 'SIE', 'WRZ', 'PAŹ', 'LIS', 'GRU');
var monthArrayLong = new Array('Styczeń', 'Luty', 'Marzec', 'Kwiecień', 'Maj', 'Czerwiec', 'Lipiec', 'Sierpień', 'Wrzesień', 'Październik', 'Listopad', 'Grudzień');
 
var dateSeparator = '-';
var dateFormat = 'ymd';


function displayDatePicker(dateFieldName, displayBelowThisObject, dtFormat, dtSep) {
  var targetDateField = document.getElementById(dateFieldName);
 
	if(!displayBelowThisObject) displayBelowThisObject = targetDateField;
   
  var x = displayBelowThisObject.offsetLeft + 24;
  var y = displayBelowThisObject.offsetTop + displayBelowThisObject.offsetHeight ;
 
  var parent = displayBelowThisObject;
  while(parent.offsetParent) {
    parent = parent.offsetParent;
    x += parent.offsetLeft;
    y += parent.offsetTop ;
  }
 
  drawDatePicker(targetDateField, x, y);
}

function drawDatePicker(targetDateField, x, y) {
  var dt = getFieldDate(targetDateField.value );
  if (!document.getElementById(datePickerDivID)) {
    var newNode = document.createElement("div");
    newNode.setAttribute("id", datePickerDivID);
    newNode.setAttribute("class", "dpDiv");
    newNode.setAttribute("style", "visibility: hidden;");
    document.body.appendChild(newNode);
  }
 
  var pickerDiv = document.getElementById(datePickerDivID);
  pickerDiv.style.position = "absolute";
  pickerDiv.style.left = x + "px";
  pickerDiv.style.top = y + "px";
  pickerDiv.style.visibility = (pickerDiv.style.visibility == "visible" ? "hidden" : "visible");
  pickerDiv.style.display = (pickerDiv.style.display == "block" ? "none" : "block");
  pickerDiv.style.zIndex = 10000;
 
  refreshDatePicker(targetDateField.id, dt.getFullYear(), dt.getMonth(), dt.getDate());
}

function pfeGetDay(cdate)
{
    if (cdate.getDay()==0)
        return 6;
    else 
        return cdate.getDay()-1;
}

function refreshDatePicker(dateFieldName, year, month, day) {
  var thisDay = new Date();
 
  if ((month >= 0) && (year > 0)) {
    thisDay = new Date(year, month, 1);
  } else {
    day = thisDay.getDate();
    thisDay.setDate(1);
  }
 
 
  var crlf = "\r\n";
  var TABLE = "<table cols=7 class='dpTable'>" + crlf;
  var xTABLE = "</table>" + crlf;
  var TR = "<tr class='dpTR'>";
  var TR_title = "<tr class='dpTitleTR'>";
  var TR_days = "<tr class='dpDayTR'>";
  var TR_todaybutton = "<tr class='dpTodayButtonTR'>";
  var xTR = "</tr>" + crlf;
  var TD = "<td class='dpTD' onMouseOut='this.className=\"dpTD\";' onMouseOver=' this.className=\"dpTDHover\";' ";
  var TD_title = "<td colspan=5 class='dpTitleTD'>";
  var TD_buttons = "<td class='dpButtonTD'>";
  var TD_todaybutton = "<td colspan=7 class='dpTodayButtonTD'>";
  var TD_days = "<td class='dpDayTD'>";
  var TD_selected = "<td class='dpDayHighlightTD' onMouseOut='this.className=\"dpDayHighlightTD\";' onMouseOver='this.className=\"dpTDHover\";' ";
  var xTD = "</td>" + crlf;
  var DIV_title = "<div class='dpTitleText'>";
  var DIV_selected = "<div class='dpDayHighlight'>";
  var xDIV = "</div>";
 
  var html = TABLE;
 
  html += TR_title;
  html += TD_buttons + getButtonCode(dateFieldName, thisDay, -1, "&laquo;") + xTD;
  html += TD_title + DIV_title + monthArrayLong[ thisDay.getMonth()] + " " + thisDay.getFullYear() + xDIV + xTD;
  html += TD_buttons + getButtonCode(dateFieldName, thisDay, 1, "&raquo;") + xTD;
  html += xTR;
	html += TR_days;
  for(i = 0; i < dayArrayShort.length; i++)
    html += TD_days + dayArrayShort[i] + xTD;
  html += xTR;
	html += TR;
  for (i = 0; i < pfeGetDay(thisDay); i++)
    html += TD + "&nbsp;" + xTD;
 
  do {
		dayNum = thisDay.getDate();
    TD_onclick = " onclick=\"updateDateField('" + dateFieldName + "', '" + getDateString(thisDay) + "');\">";
    if (dayNum == day)
      html += TD_selected + TD_onclick + DIV_selected + dayNum + xDIV + xTD;
    else
      html += TD + TD_onclick + dayNum + xTD;
    if (pfeGetDay(thisDay)  == 6)
      html += xTR + TR;
    
    thisDay.setDate(thisDay.getDate() + 1);
  } while (thisDay.getDate() > 1)
 
  
	for (i = 6; i > pfeGetDay(thisDay) ; i--)
      html += TD + "&nbsp;" + xTD;
  
  html += xTR;
 
  var today = new Date();
  var todayString = "Today is " + dayArrayMed[today.getDay()] + ", " + monthArrayMed[ today.getMonth()] + " " + today.getDate();
  html += TR_todaybutton + TD_todaybutton;
  html += "<button class='dpTodayButton' onClick='refreshDatePicker(\"" + dateFieldName + "\");'>obecny miesiąc</button> ";
  html += "<button class='dpTodayButton' onClick='updateDateField(\"" + dateFieldName + "\");'>zamknij</button>";
  html += xTD + xTR;
	html += xTABLE;
 
  document.getElementById(datePickerDivID).innerHTML = html;
  adjustiFrame();
}

function getButtonCode(dateFieldName, dateVal, adjust, label) {
  var newMonth = (dateVal.getMonth () + adjust) % 12;
  var newYear = dateVal.getFullYear() + parseInt((dateVal.getMonth() + adjust) / 12);
  if (newMonth < 0) {
    newMonth += 12;
    newYear += -1;
  }
 return "<button class='dpButton' onClick='refreshDatePicker(\"" + dateFieldName + "\", " + newYear + ", " + newMonth + ");'>" + label + "</button>";
}

function getDateString(dateVal) {
  var dayString = "00" + dateVal.getDate();
  var monthString = "00" + (dateVal.getMonth()+1);
  dayString = dayString.substring(dayString.length - 2);
  monthString = monthString.substring(monthString.length - 2);
 
  switch (dateFormat) {
    case "dmy" :
      return dayString + dateSeparator + monthString + dateSeparator + dateVal.getFullYear();
    case "ymd" :
      return dateVal.getFullYear() + dateSeparator + monthString + dateSeparator + dayString;
    case "mdy" :
    default :
      return monthString + dateSeparator + dayString + dateSeparator + dateVal.getFullYear();
  }
}

function getFieldDate(dateString) {
  var dateVal;
  var dArray;
  var d, m, y;
 
  try {
    dArray = splitDateString(dateString);
    if (dArray) {
      switch (dateFormat) {
        case "dmy" :
          d = parseInt(dArray[0], 10);
          m = parseInt(dArray[1], 10) - 1;
          y = parseInt(dArray[2], 10);
          break;
        case "ymd" :
          d = parseInt(dArray[2], 10);
          m = parseInt(dArray[1], 10) - 1;
          y = parseInt(dArray[0], 10);
          break;
        case "mdy" :
        default :
          d = parseInt(dArray[1], 10);
          m = parseInt(dArray[0], 10) - 1;
          y = parseInt(dArray[2], 10);
          break;
      }
      dateVal = new Date(y, m, d);
    } else if (dateString) {
      dateVal = new Date(dateString);
    } else {
      dateVal = new Date();
    }
  } catch(e) {
    dateVal = new Date();
  }
 
  return dateVal;
}

function splitDateString(dateString) {
  var dArray;
  if (dateString.indexOf("/") >= 0)
    dArray = dateString.split("/");
  else if (dateString.indexOf(".") >= 0)
    dArray = dateString.split(".");
  else if (dateString.indexOf("-") >= 0)
    dArray = dateString.split("-");
  else if (dateString.indexOf("\\") >= 0)
    dArray = dateString.split("\\");
  else
    dArray = false;
 
  return dArray;
}

function updateDateField(dateFieldName, dateString) {
  var targetDateField = document.getElementById(dateFieldName);
  if (dateString)
    targetDateField.value = dateString;
 
  var pickerDiv = document.getElementById(datePickerDivID);
  pickerDiv.style.visibility = "hidden";
  pickerDiv.style.display = "none";
 
  adjustiFrame();
  targetDateField.focus();
  if ((dateString) && (typeof(datePickerClosed) == "function"))
    datePickerClosed(targetDateField);
}

function adjustiFrame(pickerDiv, iFrameDiv) {
  var is_opera = (navigator.userAgent.toLowerCase().indexOf("opera") != -1);
  if (is_opera)
    return;
  
  try {
    if (!document.getElementById(iFrameDivID)) {
      var newNode = document.createElement("iFrame");
      newNode.setAttribute("id", iFrameDivID);
      newNode.setAttribute("src", "javascript:false;");
      newNode.setAttribute("scrolling", "no");
      newNode.setAttribute ("frameborder", "0");
      document.body.appendChild(newNode);
    }
    
    if (!pickerDiv)
      pickerDiv = document.getElementById(datePickerDivID);
    if (!iFrameDiv)
      iFrameDiv = document.getElementById(iFrameDivID);
    
    try {
      iFrameDiv.style.position = "absolute";
      iFrameDiv.style.width = pickerDiv.offsetWidth;
      iFrameDiv.style.height = pickerDiv.offsetHeight ;
      iFrameDiv.style.top = pickerDiv.style.top;
      iFrameDiv.style.left = pickerDiv.style.left;
      iFrameDiv.style.zIndex = pickerDiv.style.zIndex - 1;
      iFrameDiv.style.visibility = pickerDiv.style.visibility ;
      iFrameDiv.style.display = pickerDiv.style.display;
    } catch(e) {
    }
 
  } catch (ee) {
  }
}

function SetLast2Weeks(tbFrom, tbTo)
{
    var from=document.getElementById(tbFrom);
    if (from)
    {
        var ago=new Date();
        ago.setDate(ago.getDate()-14);
        var month=ago.getMonth()+1;
        if (month<10) month='0'+month;
        var day=ago.getDate();
        if (day<10) day='0'+day;
        from.value= day+"."+month+"."+ago.getFullYear();        
    }
    var to=document.getElementById(tbTo);
    if (to)
    {
        var today=new Date();
        var month=today.getMonth()+1;
        if (month<10) month='0'+month;
        var day=today.getDate();
        if (day<10) day='0'+day;
        to.value= day+"."+month+"."+today.getFullYear();
    }
}