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, -12, "&lt;") + xTD;
    html += TD_title + DIV_title +  thisDay.getFullYear() + xDIV + xTD;
    html += TD_buttons + getButtonCode(dateFieldName, thisDay, 12, "&gt;") + xTD;
    html += xTR;

 
    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 + "\");'>" + "today" + "<\/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);
    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) {
    }
 
  }