function getDateMonth(stringToMatch) {
    
    for (i = 0; i < 12; i++) {
        if (stringToMatch == months[i])
            return i;
    }

    return 0;
}
function positionInfo(object) {

   var p_elm = object;

   this.getElementLeft = getElementLeft;
   function getElementLeft() {
      var x = 0;
      var elm;
      if (typeof (p_elm) == "object") {
         elm = p_elm;
      } else {
         elm = document.getElementById(p_elm);
      }
      while (elm != null) {
         x += elm.offsetLeft;
         elm = elm.offsetParent;
      }
      return parseInt(x);
   }

   this.getElementWidth = getElementWidth;
   function getElementWidth() {
      var elm;
      if (typeof (p_elm) == "object") {
         elm = p_elm;
      } else {
         elm = document.getElementById(p_elm);
      }
      return parseInt(elm.offsetWidth);
   }

   this.getElementRight = getElementRight;
   function getElementRight() {
      return getElementLeft(p_elm) + getElementWidth(p_elm);
   }

   this.getElementTop = getElementTop;
   function getElementTop() {
      var y = 0;
      var elm;
      if (typeof (p_elm) == "object") {
         elm = p_elm;
      } else {
         elm = document.getElementById(p_elm);
      }
      while (elm != null) {
         y += elm.offsetTop;
         elm = elm.offsetParent;
      }
      return parseInt(y);
   }

   this.getElementHeight = getElementHeight;
   function getElementHeight() {
      var elm;
      if (typeof (p_elm) == "object") {
         elm = p_elm;
      } else {
         elm = document.getElementById(p_elm);
      }
      return parseInt(elm.offsetHeight);
   }

   this.getElementBottom = getElementBottom;
   function getElementBottom() {
      return getElementTop(p_elm) + getElementHeight(p_elm);
   }
}

function CC() {
   var calendarId = 'CC';
   var currentYear = 0;
   var currentMonth = 0;
   var currentDay = 0;

   var selectedYear = 0;
   var selectedMonth = 0;
   var selectedDay = 0;

   var dateField = null;

   var pudCtrl = null;
   var dodCtrl = null;
   var outCtrl = null;
   var pudHrCtrl = null;
   var pudMnCtrl = null;
   var dodHrCtrl = null;
   var dodMnCtrl = null;

   function getProperty(p_property) {
      var p_elm = calendarId;
      var elm = null;

      if (typeof (p_elm) == "object") {
         elm = p_elm;
      } else {
         elm = document.getElementById(p_elm);
      }
      if (elm != null) {
         if (elm.style) {
            elm = elm.style;
            if (elm[p_property]) {
               return elm[p_property];
            } else {
               return null;
            }
         } else {
            return null;
         }
      }
   }

   function setElementProperty(p_property, p_value, p_elmId) {
      var p_elm = p_elmId;
      var elm = null;

      if (typeof (p_elm) == "object") {
         elm = p_elm;
      } else {
         elm = document.getElementById(p_elm);
      }
      if ((elm != null) && (elm.style != null)) {
         elm = elm.style;
         elm[p_property] = p_value;
      }
   }

   function setProperty(p_property, p_value) {
      setElementProperty(p_property, p_value, calendarId);
   }

   function getDaysInMonth(year, month) {
      return [31, ((!(year % 4) && ((year % 100) || !(year % 400))) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month - 1];
   }

   function getDayOfWeek(year, month, day) {
      var date = new Date(year, month - 1, day)
      return date.getDay();
   }

   this.clearDate = clearDate;
   function clearDate() {
      dateField.value = '';
      hide();
   }

   this.setDate = setDate;
   function setDate(year, month, day) {
      if (dateField) {
         if (month < 10) { month = "0" + month; }

         //get date seperator
         var seperator = ' '; //dateField.value.charAt(2);



         var dateString = day + seperator + months[month - 1] + seperator + year
         dateField.value = dateString;
         hide();
         showDuration(pudCtrl, dodCtrl, outCtrl, pudHrCtrl, pudMnCtrl, dodHrCtrl, dodMnCtrl);
      }
      return;
   }

   function padDayPart(dayPart) {
      if (dayPart.split("/")[0].length == 1) {
         return 0 + dayPart;
      }
      return dayPart;
   }
  
   this.showDuration = showDuration;
   function showDuration(pudCtrl, dodCtrl, outCtrl, pudHrCtrl, pudMnCtrl, dodHrCtrl, dodMnCtrl) {
      if (pudCtrl != null && dodCtrl != null && outCtrl != null) {

         var pudString = new String(pudCtrl.value);
         var dodString = new String(dodCtrl.value);

     
         // in memory replace anything which is not a digit with a forward slash
         // to signify a date seperator

         var pattern = /\D/g;
         var pudMonthToMatch = pudString.match(pattern).toString().replace(/\,/g, "").replace(/^\s*|\s*$/g, "");
         var pudMonth = getDateMonth(pudMonthToMatch);
         pudString = pudString.replace(" " + pudMonthToMatch + " ", "/");

         var dodMonthToMatch = dodString.match(pattern).toString().replace(/\,/g, "").replace(/^\s*|\s*$/g, "");
         var dodMonth = getDateMonth(dodMonthToMatch);
         dodString = dodString.replace(" " + dodMonthToMatch + " ", "/");
   
         pudString = padDayPart(pudString);

         dodString = padDayPart(dodString);


         if (pudString.length == 7 && dodString.length == 7) {
            var pudParts = pudString.split("/");
            var pudDay = parseInt(pudParts[0], 10);
       
            var pudYear = parseInt(pudParts[1], 10);
            var pud = new Date();
            pud.setFullYear(pudYear, pudMonth, pudDay);
            pud.setHours(parseInt(pudHrCtrl.value, 10), parseInt(pudMnCtrl.value, 10), 0, 0);

            var dodParts = dodString.split("/");
            var dodDay = parseInt(dodParts[0], 10);            
            var dodYear = parseInt(dodParts[1], 10);
            var dod = new Date();
            dod.setFullYear(dodYear, dodMonth, dodDay);
            dod.setHours(parseInt(dodHrCtrl.value, 10), parseInt(dodMnCtrl.value, 10), 0, 0);

            //Set 1 day in milliseconds
            var one_day = 1000 * 60 * 60 * 24;
            
            // calculate time zone offset difference in milliseconds
            var offsetDiff = (dod.getTimezoneOffset() - pud.getTimezoneOffset()) * 60 * 1000;
            
            // now calculate difference corrected with offset considering DST
            var diff = dod.getTime() - pud.getTime() - offsetDiff;
            
            // calculate in days
            var duration = diff / one_day;
            
            // calculate minutes, hours, days to avoid rounding errors
            diff = diff / 1000 / 60;
            var minutes = Math.floor(diff % 60);
               diff = diff / 60;
            var hours = Math.floor(diff % 24);
               diff = diff / 24;
            var days = Math.floor(diff);
            
            // finally round up the value as we do not have hourly rental
            // considering the 59 minutes grace period as well
            var durationDays;
            if (hours >= 1)
            {
               durationDays = Math.ceil(duration);
            }
            else
            {
               durationDays = Math.floor(duration);
            }
            
            outCtrl.innerHTML = /* duration +"<br/>"+ */durationDays;  //+ "<br/>" + pud.toString() + " .. <br/>" + dod.toString() + "";
            
            if (durationDays < 0) {
               var defaultRentalLength = 2;
               dod = new Date(pud.getFullYear(), pud.getMonth(), pud.getDate() + defaultRentalLength);

               var dodDayString = (dod.getDate()).toString();               
               var dodYearString = (dod.getFullYear()).toString();

               //if (dodDayString < 10) dodDayString = "0" + dodDayString;               

               var seperator = " "; 
               dodCtrl.value = dodDayString + seperator + months[dod.getMonth()] + seperator + dodYearString;
               outCtrl.innerHTML = defaultRentalLength;

            }
         }
      }
   }

   this.changeMonth = changeMonth;
   function changeMonth(change) {

      currentMonth += change;
      currentDay = 0;
      if (currentMonth > 12) {
         currentMonth = 1;
         currentYear++;
      } else if (currentMonth < 1) {
         currentMonth = 12;
         currentYear--;
      }

      calendar = document.getElementById(calendarId);
      calendar.innerHTML = calendarDrawTable();
   }

   this.changeYear = changeYear;
   function changeYear(change) {
      currentYear += change;
      currentDay = 0;
      calendar = document.getElementById(calendarId);
      calendar.innerHTML = calendarDrawTable();
   }

   function getCurrentYear() {
      var year = new Date().getYear();
      if (year < 1900) year += 1900;
      return year;
   }

   function getCurrentMonth() {
      return new Date().getMonth() + 1;
   }

   function getCurrentDay() {
      return new Date().getDate();
   }

   function calendarDrawTable() {
      var nextMonth = currentMonth;
      var nextMonthYear = currentYear;
      if (currentMonth == 12) {
         nextMonth = 1;
         nextMonthYear++;
      }
      else {
         nextMonth++;
      }
      
      var tables = "<table cellspacing='0' cellpadding='0' border='0'>";
      tables = tables + "<tr>";
      tables = tables + "<td class='calMonth'>";
      tables = tables + calMonthAsHtml(currentYear, currentMonth, 1, true, false);
      tables = tables + "</td><td class='calMonth'>";
      tables = tables + calMonthAsHtml(nextMonthYear, nextMonth, 1, false, true);
      tables = tables + "</td>";
      tables = tables + "</tr>";
      //tables = tables + "<tr class='header'><th colspan='2' style='padding: 3px;'><a href='javascript:clearCC();'>Clear</a> | <a href='javascript:hideCC();'>Close</a></th></tr>";
      tables = tables + "<tr class='calFoot'><td colspan='2'><a href='javascript:hideCC();'>" + linkCloseText + "</a>&nbsp;<a href='javascript:hideCC();'><img src='/assets/build/calClose.gif' alt='" + linkCloseText + "' /></a></td></tr>";
      tables = tables + "</table>";

      return tables;
   }

   function calMonthAsHtml(year, month, day, showLeft, showRight) {
      var validDay = 0;
      var startDayOfWeek = getDayOfWeek(year, month, day);
      var daysInMonth = getDaysInMonth(year, month);
      var css_class = null;

      var table = "<table cellspacing='0' cellpadding='0' border='0'>";
      table = table + "<tr class='header'>";
      var colspan = 7;
      var dateNow = new Date();
      var disableLeft = false;
      
      if (showLeft && (dateNow.getFullYear() == year) && (dateNow.getMonth() == month-1)) {
         disableLeft = true;
      }

      if (showLeft) {
         colspan--;
         if (!disableLeft) {
            table = table + "<td colspan='1' class='previous title'><a href='javascript:changeCCMonth(-1);'><img src='/assets/build/calPrevActive.gif' alt='" + linkPrevMonthText + "' /></a></td>";
         }
         else{
            table = table + "<td colspan='1' class='previous title'><img src='/assets/build/calPrevDisabled.gif' alt='" + linkPrevMonthText + "' /></td>";
         }
      }
      if (showRight) {
         colspan--;
      }
      table = table + "<td colspan='"+ colspan +"' class='title'>" + months[month - 1] + "&nbsp;" + year + "</td>";
      if (showRight) {
         table = table + "<td colspan='1' class='next title'><a href='javascript:changeCCMonth(1);'><img src='/assets/build/calNextActive.gif' alt='" + linkNextMonthText + "' /></a></td>";
      }
      table = table + "</tr>";
      table = table + "<tr>";
      for (var dayOfWeek = 0; dayOfWeek < 7; dayOfWeek++) {
         table = table + "<th>" + dayNames[dayOfWeek] + "</th>";
      };
      table = table + "</tr>";

      for (var week = 0; week < 6; week++) {
         table = table + "<tr>";
         for (var dayOfWeek = 0; dayOfWeek < 7; dayOfWeek++) {
            if (week == 0 && startDayOfWeek == dayOfWeek) {
               validDay = 1;
            } else if (validDay == 1 && day > daysInMonth) {
               validDay = 0;
            }

            if (validDay) {
               if (day == selectedDay && year == selectedYear && month == selectedMonth) {
                  css_class = 'current';
               } else if (dayOfWeek == 0 || dayOfWeek == 6) {
                  css_class = 'weekend';
               } else {
                  css_class = 'weekday';
               }

               table = table + "<td><a class='" + css_class + "' href=\"javascript:setCCDate(" + year + "," + month + "," + day + ")\">" + day + "</a></td>";

               day++;
            } else {
               table = table + "<td class='empty'>&nbsp;</td>";
            }
         }
         table = table + "</tr>";
      }

      table = table + "</table>";

      return table;
   }

   this.show = show;
   function show(field, pickupCtrlId, dropoffCtrlId, outputCtrlId, pudHrId, pudMnId, dodHrId, dodMnId) {
      can_hide = 0;

      if (dateField == field) {
         return;
      } else {
         dateField = field;
      }

      pudCtrl = document.getElementById(pickupCtrlId);
      dodCtrl = document.getElementById(dropoffCtrlId);
      outCtrl = document.getElementById(outputCtrlId);

      pudHrCtrl = document.getElementById(pudHrId);
      pudMnCtrl = document.getElementById(pudMnId);
      dodHrCtrl = document.getElementById(dodHrId);
      dodMnCtrl = document.getElementById(dodMnId);

      if (dateField) {
         try {
             var dateString = new String(dateField.value);
             
             var pattern = /\D/g;
             var monthToMatch = dateString.match(pattern).toString().replace(/\,/g, "").replace(/^\s*|\s*$/g, "");
             selectedMonth = getDateMonth(monthToMatch) + 1;
             dateString = dateString.replace(" " + monthToMatch + " ", "/");
                         
            var dateParts = dateString.split("/");

            selectedDay = parseInt(dateParts[0], 10);
            selectedYear = parseInt(dateParts[1], 10);
         } catch (e) { }
      }

      if (!(selectedYear && selectedMonth && selectedDay)) {
         selectedMonth = getCurrentMonth();
         selectedDay = getCurrentDay();
         selectedYear = getCurrentYear();
      }

      currentMonth = selectedMonth;
      currentDay = selectedDay;
      currentYear = selectedYear;

      if (document.getElementById) {
         calendar = document.getElementById(calendarId);
         calendar.innerHTML = calendarDrawTable();

         setProperty('display', 'block');
         
         var fieldPos = new positionInfo(dateField);
         var calendarPos = new positionInfo(calendarId);

         var x = fieldPos.getElementLeft();
         var y = fieldPos.getElementBottom();

         setProperty('left', x + "px");
         setProperty('top', y + "px");

         if (document.all) {
            setElementProperty('display', 'block', 'CCIFrame');
            setElementProperty('left', x + "px", 'CCIFrame');
            setElementProperty('top', y + "px", 'CCIFrame');
            setElementProperty('width', calendarPos.getElementWidth() + "px", 'CCIFrame');
            setElementProperty('height', calendarPos.getElementHeight() + "px", 'CCIFrame');
         }
         
//         calendar.focus();
//         calendar.onblur = hideCCOnLostFocus;
      }
   }

   this.hide = hide;
   function hide() {
      if (dateField) {
         setProperty('display', 'none');
         setElementProperty('display', 'none', 'CCIFrame');
         dateField = null;
      }
   }

   this.visible = visible;
   function visible() {
      return dateField
   }

   this.can_hide = can_hide;
   var can_hide = 0;
}

var CC = new CC();

function showCC(textField, pickupCtrlId, dropoffCtrlId, outputCtrlId, pudHrId, pudMnId, dodHrId, dodMnId) {
   CC.show(textField, pickupCtrlId, dropoffCtrlId, outputCtrlId, pudHrId, pudMnId, dodHrId, dodMnId);
}

function showCcDuration(pickupCtrlId, dropoffCtrlId, outputCtrlId, pudHrId, pudMnId, dodHrId, dodMnId) {
   CC.showDuration(document.getElementById(pickupCtrlId), document.getElementById(dropoffCtrlId), document.getElementById(outputCtrlId),
   document.getElementById(pudHrId), document.getElementById(pudMnId),
   document.getElementById(dodHrId), document.getElementById(dodMnId));
}

function validateDate(textField) {
   if (textField != null) {
      var isValid = false;
      var textValue = textField.value;
      textValue = textValue.replace(/\D/gi, "");
      if (textValue.length == 8) {
         try
         {
            var dtDay = parseInt(textValue.substr(0,2), 10);
            var dtMonth = parseInt(textValue.substr(2, 2), 10);
            var dtYear = parseInt(textValue.substr(4, 4), 10);
            var dt = new Date();
            dt.setFullYear(dtYear, dtMonth + 1, dtDay);
            isValid = true;
            if (dtDay < 10) dtDay = "0"+dtDay;
            if (dtMonth < 10) dtMonth = "0"+dtMonth;
            textValue = dtDay + "/" + dtMonth + "/" + dtYear;
         }
         catch (e) {}
      }
      if (!isValid) {
         textField.value = "";
      }
      else {
         textField.value = textValue;
      }
   }
}

function clearCC() {
   CC.clearDate();
}

function hideCC() {
   if (CC.visible()) {
      CC.hide();
   }
}

// This snippet is to close the calendar when the user is clicking somewhere else
// but this is not working yet
// TODO: find a way to recognise which element has the focus. [instead of ...gotFocus]
//function hideCCOnLostFocus()
//{
//   var calendar = document.getElementById("CC");
//   var isFocusInsideCalendar = false;
//   
//   isFocusInsideCalendar = iterateThroughNodes(calendar);   
//   
//   if(!isFocusInsideCalendar)
//   {
//      hideCC();
//   }
//}


//function iterateThroughNodes(node)
//{
//   var foundFocus = false;
//  
//   if(node && node.childNodes.length > 0)
//   {
//      for(var i=0;i<node.childNodes.length;i++)
//      {
//         try
//         {
//            if ( node.childNodes[i].gotFocus )
//            {
//               foundFocus = true;
//               break;
//            }
//            else
//            {
//               iterateThroughNodes(node.childNodes[i]);
//            }
//         }
//         catch (ex)
//         {
//            // catch exception for when the element doesn't support the gotFocus attribute.
//         }
//      }
//   }
//   
//   return foundFocus;
//}


function setCCDate(year, month, day) {
   CC.setDate(year, month, day);
}

function changeCCYear(change) {
   CC.changeYear(change);
}

function changeCCMonth(change) {
   CC.changeMonth(change);
}


document.write("<iframe id='CCIFrame' src='javascript:false;' frameBorder='0' scrolling='no'></iframe>");
document.write("<div id='CC'></div>");