var datePickerDivID = "datepicker";

 

var iFrameDivID = "datepickeriframe";

 

 

 

var dayArrayShort = new Array('Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa');

 

var dayArrayMed = new Array('Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat');

 

var dayArrayLong = new Array('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday');

 

var monthArrayShort = new Array('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec');

 

var monthArrayMed = new Array('Jan', 'Feb', 'Mar', 'Apr', 'May', 'June', 'July', 'Aug', 'Sept', 'Oct', 'Nov', 'Dec');

 

var monthArrayLong = new Array('January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December');

 

var defaultDateSeparator = "/";        

var defaultDateFormat = "mdy"    

 

var dateSeparator = defaultDateSeparator;

 

var dateFormat = defaultDateFormat;

 

function displayDatePicker(dateFieldName, displayBelowThisObject, dtFormat, dtSep)

 

{

    

  var targetDateField = document.getElementsByName (dateFieldName).item(0);

 

  if (!displayBelowThisObject)

 

    displayBelowThisObject = targetDateField;

  if (dtSep)

 

    dateSeparator = dtSep;

 

  else

 

    dateSeparator = defaultDateSeparator;

 

  if (dtFormat)

 

    dateFormat = dtFormat;

 

  else

 

    dateFormat = defaultDateFormat;

 

 

 

  var x = displayBelowThisObject.offsetLeft;

 

  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.name, dt.getFullYear(), dt.getMonth(), dt.getDate());

 

}

 

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\";' ";    // leave this tag open, because we'll be adding an onClick event

 

  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\";' ";    // leave this tag open, because we'll be adding an onClick event

 

  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, "&lt;") + xTD;

 

  html += TD_title + DIV_title + monthArrayLong[ thisDay.getMonth()] + " " + thisDay.getFullYear() + xDIV + xTD;

 

  html += TD_buttons + getButtonCode(dateFieldName, thisDay, 1, "&gt;") + 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 < thisDay.getDay(); 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 (thisDay.getDay() == 6)

 

      html += xTR + TR;

 

    thisDay.setDate(thisDay.getDate() + 1);

 

  } while (thisDay.getDate() > 1)

 

  if (thisDay.getDay() > 0) {

 

    for (i = 6; i > thisDay.getDay(); 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 + "\");'>This Month</button> ";

 

  html += "<button class='dpTodayButton' onClick='updateDateField(\"" + dateFieldName + "\");'>Close</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.getElementsByName (dateFieldName).item(0);

// alert(targetDateField);

  if (dateString)

 

    targetDateField.value = dateString;

    //     alert(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) {

 

  }

}