function SetDate(id,thisdate,fieldname,formId) {
  eval("document.getElementById('" + formId + "').value = thisdate");
  ToggleObject(id);
}

function ShowCalendar(id,inputdate) {

  PopulateCalendar(id,inputdate.value,inputdate.name,inputdate.id) 
  ToggleObject(id);
}

function PopulateCalendar(id,thisdate,fieldname,formId) {
  var validformat = new RegExp("^[0-9]{2}-[0-9]{2}-[0-9]{4}$");
  var entrydate = new Date();
  var today = new Date();

  if (thisdate != "") {
    if (validformat.test(thisdate) == true) {
      var a = thisdate.split("-");
      var date = new Date();
	  date.setFullYear(a[2],a[1]-1,a[0])
      if (!isNaN(date)) {
        entrydate.setTime(date);
      }
    }
  }

  var monthList = "Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec";
  var todayLabel = "Today";
  var dayList = "S M T W T F S";
  var monName = monthList.split(" ");
  var dayLetter = dayList.split(" ");

  var date = entrydate.getDate();
  var day = entrydate.getDay();
  var month = entrydate.getMonth();
  var year = entrydate.getYear();
  if (year < 1900) {
    year = year + 1900;
  }

  if (today.getDate() < 10) {
    var todaydate = "0" + today.getDate();
  } else {
    var todaydate = today.getDate();
  }
  if (today.getYear() < 1900) {
    var todayyear = today.getYear() + 1900;
  } else {
    var todayyear = today.getYear();
  }

  var firstthismonthday = (new Date(year,month,1)).getDay();
  var lastthismonth = (new Date(new Date(year,month+1,1) - (1000*24*60*60))).getDate();
  var lastpreviousmonth = (new Date(new Date(year,month,1) - (1000*24*60*60))).getDate();

  var nextmonthNumber = (new Date(year,month+1,1)).getMonth()+1;
  var nextmonth = monName[nextmonthNumber-1];
  var nextmonthyear = (new Date(year,month+1,1)).getYear();
  var previousmonthNumber = (new Date(year,month-1,1)).getMonth()+1;
  var previousmonth = monName[previousmonthNumber-1];
  var previousmonthyear = (new Date(year,month-1,1)).getYear();
  if (nextmonthyear < 1900) {
    nextmonthyear = nextmonthyear + 1900;
  }
  if (previousmonthyear < 1900) {
    previousmonthyear = previousmonthyear + 1900;
  }
  if (nextmonthNumber < 10) {
    nextmonthNumber = "0" + nextmonthNumber;
  }
  if (previousmonthNumber < 10) {
    previousmonthNumber = "0" + previousmonthNumber;
  }
  var todayMonthNumber = today.getMonth()+1;
  if (todayMonthNumber < 10) {
    todayMonthNumber = "0" + todayMonthNumber;
  } 
  var monthNumber = month + 1;
  if (monthNumber < 10) {
    monthNumber = "0" + monthNumber;
  } 
  
  
  var nextmonthtag = "<a href=\"#\" onclick=\"PopulateCalendar('" + id + "','01-" + nextmonthNumber + "-" + nextmonthyear + "','" + fieldname + "','" + formId + "'); return false;\">&gt;&gt;</a>";
  var previousmonthtag = "<a href=\"#\" onclick=\"PopulateCalendar('" + id + "','01-" + previousmonthNumber + "-" + previousmonthyear + "','" + fieldname + "','" + formId + "'); return false;\">&lt;&lt;</a>";
  var todaytag = "<a href=\"#\" onclick=\"SetDate('" + id + "','" + todaydate + "-" + todayMonthNumber + "-" + todayyear + "','" + fieldname + "','" + formId + "'); return false;\">"+todayLabel+"</a>";

  var tableArray = new Array(42);
  var c = 0;
  for (ctr = 0; ctr < firstthismonthday; ctr++) {
    lmday = (lastpreviousmonth - (firstthismonthday - ctr) + 1);
    lmdaystr = lmday;
    if (lmday < 10) {
      lmdaystr = "0" + lmday;
    }
    lmtag = "<a href=\"#\" onclick=\"SetDate('" + id + "','" + lmdaystr + "-" + previousmonthNumber + "-" + previousmonthyear + "','" + fieldname + "','" + formId + "'); return false;\">" + lmday + "</a>";
    tableArray[c] = "<td class='cal_notThisMonth'>" + lmtag + "</td>\n";
    c++;
  }
  for (ctr = 0; ctr < lastthismonth; ctr++) {
    tmday = (ctr + 1);
    tmdaystr = tmday;
    if (tmday < 10) {
      tmdaystr = "0" + tmday;
    }
    tmtag = "<a href=\"#\" onclick=\"SetDate('" + id + "','" + tmdaystr + "-" + monthNumber + "-" + year + "','" + fieldname + "','" + formId + "'); return false;\">" + tmday + "</a>";
    tableArray[c] = "<td class='cal_thisMonth'>" + tmtag + "</td>\n";
    c++;
  }
  for (ctr = 0; c < 42; ctr++) {
    nmday = (ctr+1);
    nmdaystr = nmday;
    if (nmday < 10) {
      nmdaystr = "0" + nmday;
    }
    nmtag = "<a href=\"#\" onclick=\"SetDate('" + id + "','" + nmdaystr + "-" + nextmonthNumber + "-" + nextmonthyear + "','" + fieldname + "','" + formId + "'); return false;\">" + nmday + "</a>";
    tableArray[c] = "<td class='cal_notThisMonth'>" + nmtag + "</td>\n";
    c++;
  }

  var htmltext = "<table class='cal'>\n";
  htmltext += "  <tr>\n";
  htmltext += "    <td colspan='7' class='cal_titles'>" + previousmonthtag + " &nbsp; " + monName[month] + " " + year + " &nbsp; " + nextmonthtag + "</td>\n";
  htmltext += "  </tr>\n";
  htmltext += "  <tr>\n";
  htmltext += "    <td class='cal_day'>"+dayLetter[0]+"</td>\n";
  htmltext += "    <td class='cal_day'>"+dayLetter[1]+"</td>\n";
  htmltext += "    <td class='cal_day'>"+dayLetter[2]+"</td>\n";
  htmltext += "    <td class='cal_day'>"+dayLetter[3]+"</td>\n";
  htmltext += "    <td class='cal_day'>"+dayLetter[4]+"</td>\n";
  htmltext += "    <td class='cal_day'>"+dayLetter[5]+"</td>\n";
  htmltext += "    <td class='cal_day'>"+dayLetter[6]+"</td>\n";
  htmltext += "  </tr>\n";

  for (c1 = 0; c1 < 6; c1++) {
    htmltext += "<tr>\n";

    for (c2 = 0; c2 < 7; c2++) {
      htmltext += tableArray[(c1*7) + c2];
    }

    htmltext += "</tr>\n";
  }

  htmltext += "  <tr>\n";
  htmltext += "    <td colspan='7' class='cal_titles'>" + todaytag + "</td>\n";
  htmltext += "  </tr>\n";
  htmltext += "</table>\n";

  document.getElementById(id).innerHTML=htmltext;
}