var isShow=-1;
var isLess=true;
var weekend = [0,6];
var gNow = new Date();
var ggWinCal;
var isNav = (navigator.appName.indexOf("Netscape") > -1) ? true : false;
var isIE = (navigator.appName.indexOf("Microsoft") > -1) ? true : false;
var Days = ['Sun','Mon','Tue','Wed','Thu','Fri','Sat'];
var Months = ['January','February','March','April','May','June','July','August','September','October','November','December'];
var sFormat = 'MM/DD/YYYY';
var sMonth='Month';
var sYear='Year';
var sCalendar='Calendar';
var parsDate=new Array(3);
var parsFormat=new Array(3);
var parsDelims=['/','/'];

// form objects
calDocForm=null;
fCreateFrom=null;
fCreateTo=null;
fModFrom=null;
fModTo=null;
fCloseTo=null;
fCloseFrom=null;
chCreate=null;
chMod=null;
chClose=null;

// Non-Leap year Month days..
Calendar.DOMonth = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
// Leap year Month days..
Calendar.lDOMonth = [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];

function insDate(fdate, retItem) {
  eval(retItem + ".value='" + fdate+"'");
  eval(retItem + ".focus()");
  hideCalendar();
}

// Format string should contain all three parts of date (month, day and year)
function parseFormat(vformat) {
  var flen=vformat.length;
  var dind=vformat.indexOf("DD");
  var yind=vformat.indexOf("YYYY");
  var ylen=4;
  if(yind<0){
    yind=vformat.indexOf("YY");
    ylen=2;
  }
  var mind=vformat.indexOf("MM");
  var mlen=2;
  if(mind<0){
    mind=vformat.indexOf("MONTH");
    mlen=5;
  }
  if(mind<0){
    mind=vformat.indexOf("MON");
    mlen=3;
  }
  if (dind<0 || yind<0 || mind<0){
    return;
  } else {
    if(dind==0){
      parsFormat[0]="DD";
      if(mind<yind){
        parsFormat[1]=vformat.substring(mind,mind+mlen);
        parsFormat[2]=vformat.substring(yind,yind+ylen);
        parsDelims[0]=vformat.substring(2,mind);
        parsDelims[1]=vformat.substring(mind+mlen,yind);
      } else {
        parsFormat[2]=vformat.substring(mind,mind+mlen);
        parsFormat[1]=vformat.substring(yind,yind+ylen);
        parsDelims[0]=vformat.substring(2,yind);
        parsDelims[1]=vformat.substring(yind+ylen,mind);
      }
    } else if(mind==0){
      parsFormat[0]=vformat.substring(0,mlen);
      if(dind<yind){
        parsFormat[1]=vformat.substring(dind,dind+2);
        parsFormat[2]=vformat.substring(yind,yind+ylen);
        parsDelims[0]=vformat.substring(mlen,dind);
        parsDelims[1]=vformat.substring(dind+2,yind);
      } else {
        parsFormat[2]=vformat.substring(dind,dind+2);
        parsFormat[1]=vformat.substring(yind,yind+ylen);
        parsDelims[0]=vformat.substring(mlen,yind);
        parsDelims[1]=vformat.substring(yind+ylen,dind);
      }
    } else if(yind==0){
      parsFormat[0]=vformat.substring(0,ylen);
      if(dind<mind){
        parsFormat[1]=vformat.substring(dind,dind+2);
        parsFormat[2]=vformat.substring(mind,mind+mlen);
        parsDelims[0]=vformat.substring(ylen,dind);
        parsDelims[1]=vformat.substring(dind+2,mind);
      } else {
        parsFormat[2]=vformat.substring(dind,dind+2);
        parsFormat[1]=vformat.substring(mind,mind+mlen);
        parsDelims[0]=vformat.substring(ylen,mind);
        parsDelims[1]=vformat.substring(mind+mlen,dind);
      }
    }
  }
}


function parseDate(vdate) {
  var ret=1;
  var ind=vdate.indexOf(parsDelims[0]);
  if(ind>0){
    if (parseDD(0,vdate.substring(0,ind))>0){
      ind+=parsDelims[0].length;
      var ind2=vdate.indexOf(parsDelims[1],ind);
      if(ind2>0) {
        if(parseDD(1,vdate.substring(ind,ind2))>0) {
          ind2+=parsDelims[1].length;
          if (parseDD(2,vdate.substring(ind2,vdate.length))<0) ret=-1;
        } else {
          ret=-1;
        }
      } else {
        ret=-1;
      }
    } else {
      ret=-1;
    }
  } else {
      ret=-1;
  }
  if (ret<0) parsDate=new Array(3);
  return ret;
}

// this function include function from validate.js (Trim).
function parseDD(vind,vdd){
  var ret=1;
  if (vind<0 || vind>2 || vdd.length<1){
    ret=-1;
  } else {
    vdd=Trim(vdd);
    while (vdd.substring(0,1)=='0' && vdd.length>1) {
      vdd=vdd.substring(1,vdd.length);
    }
    if (isFinite(vdd) || (parsFormat[vind].substring(0,2)=="MO"))
      switch (parsFormat[vind]){
        case "DD" :
          parsDate[0]=parseInt(vdd);
          if (parsDate[0]>31 || parsDate[0]<1) ret=-1;
          break;
        case "MM" :
          parsDate[1]=parseInt(vdd);
          if (parsDate[1]>12 || parsDate[1]<1) ret=-1;
          break;
        case "MON" :
          parsDate[1]=findMoNum(vdd);
          if (parsDate[1]<1) ret=-1;
          break;
        case "MONTH" :
          parsDate[1]=findMoNum(vdd);
          if (parsDate[1]<1) ret=-1;
          break;
        case "YY" :
          parsDate[2]=parseInt(vdd);
          if(parsDate[2]>=0 && parsDate[2]<100){
            if (parsDate[2]<50) parsDate[2]+=2000;
            else parsDate[2]+=1900;
          } else {
            ret=-1;
          }
          break;
        case "YYYY" :
          parsDate[2]=parseInt(vdd);
          if(parsDate[2]<0 || (parsDate[2]>99 && parsDate[2]<1000) || parsDate[2]>9999){
           ret=-1;
          } else if(parsDate[2]<100){
            if (parsDate[2]<50) parsDate[2]+=2000;
            else parsDate[2]+=1900;
          }
          break;
        default:
          ret=-1;
      }
    else
      ret=-1;
  }
  return ret;
}

function findMoNum(vmon){
  vmon=vmon.substring(0,3).toUpperCase();
  for (var i=0;i<12;i++){
    if (vmon==Months[i].substring(0,3).toUpperCase()) return i+1;
  }
  return -1;
}

function compareDate( dfrom, dto ) {
  var ret=checkDate(dfrom);
  if (ret){
    var parsFrom=parsDate;
    parsDate=new Array(3);
    ret=checkDate(dto);
    if(ret && dfrom.length>0 && dto.length>0){
      ret=false;
      if( parsDate[2]>parsFrom[2] ){
        ret=true;
      } else {
        if( parsDate[2]==parsFrom[2] && parsDate[1]>parsFrom[1] ) {
          ret=true;
        } else {
          if( parsDate[2]==parsFrom[2] && parsDate[1]==parsFrom[1] && parsDate[0]>=parsFrom[0] ) {
            ret=true;
          }
        }
      }
      if (!ret) top.showError( msgInvalidMatch );
    }
  }
  return ret;
}

function checkDate( value ) {
  var ret=false;
  if ( parseDate( value )<0 && value.length > 0 ) {
	ret = false;
  } else {
    ret = true;
  }
  return ret;
}

function getPositionTop (oElement){
     var retVal = 0;
     if (oElement.offsetParent) {
        retVal += getPositionTop (oElement.offsetParent);
        if(oElement.scrollTop) retVal-=oElement.scrollTop;
     }
     retVal += oElement.offsetTop;
     return retVal;
}

function getPositionLeft (oElement){
     var retVal = 0;
     if (oElement.offsetParent) {
        retVal += getPositionLeft (oElement.offsetParent);
        if (oElement.scrollLeft) retVal-=oElement.scrollLeft;
     }
     retVal += oElement.offsetLeft;
     return retVal;
}

function showCalendar(ctrl,aind){
  if( aind == 4 || aind == 5 ){
    if (chClose) chClose.click();
    if (closed_date) closed_date();
  }
  else if (aind<2) {
    if (chCreate) chCreate.click();
    if (creation_date) creation_date();
  } else {
    if (chMod) chMod.click();
    if (modified_date) modified_date();
  }
  if(isShow!=aind){
    var top;
    var left;
    if(document.layers){
      top=document.links[aind].y-window.pageYOffset+window.screenY+(window.outerHeight-window.innerHeight)-192-51;
      left=document.links[aind].x-window.pageXOffset+window.screenX+30;
    } else {
      top=eval('getPositionTop('+ctrl+')');
      left=eval('getPositionLeft('+ctrl+')');
      if (window.screenTop) {
        top=top+window.screenTop-212;
        left=left+window.screenLeft+2;
      } else if (window.screenY) {
        top=top+window.screenY+25;
        left=left+window.screenX+2;
      }
      if (left > screen.availWidth -240)
        left = screen.availWidth -240;
    }
    isShow=aind;
    if (aind==0){
      parseDate(fCreateTo.value);
      isLess=true;
    }
	try{
    var calM=parsDate[1]>0? new String(parsDate[1]-1):null;
    var calY=parsDate[2]>0? new String(parsDate[2]):null;
	}catch(exception){}
    show_calendar(ctrl,left,top,calM,calY,sFormat);
  } else {
    hideCalendar();
  }
}

function hideCalendar(){
  if (ggWinCal && ggWinCal.close) ggWinCal.close();
  enDate();
}

function enDate(){
  isShow=-1;
  parsDate=new Array(3);
}

function Calendar(p_item, p_WinCal, p_month, p_year, p_format) {
  if ((p_month == null) && (p_year == null))	return;
  if (p_WinCal == null)
    this.gWinCal = ggWinCal;
  else
    this.gWinCal = p_WinCal;
  if (p_month == null) {
    this.gMonthName = null;
    this.gMonth = null;
    this.gYearly = true;
  } else {
    this.gMonthName = Calendar.get_month(p_month);
    this.gMonth = new Number(p_month);
    this.gYearly = false;
  }
  this.gYear = p_year;
  this.gFormat = p_format;
  this.gBGColor = "white";
  this.gFGColor = "black";
  this.gTextColor = "black";
  this.gHeaderColor = "black";
  this.gReturnItem = p_item;
}

Calendar.get_month = Calendar_get_month;
Calendar.get_dayofweek = Calendar_get_dayofweek;
Calendar.get_daysofmonth = Calendar_get_daysofmonth;
Calendar.calc_month_year = Calendar_calc_month_year;

function Calendar_get_month(monthNo) {
	return Months[monthNo];
}

function Calendar_get_dayofweek(dayNo) {
  return Days[dayNo];
}

function Calendar_get_daysofmonth(monthNo, p_year) {
/*
Check for leap year ..
1.Years evenly divisible by four are normally leap years, except for...
2.Years also evenly divisible by 100 are not leap years, except for...
3.Years also evenly divisible by 400 are leap years.
*/
  if ((p_year % 4) == 0) {
    if ((p_year % 100) == 0 && (p_year % 400) != 0)
      return Calendar.DOMonth[monthNo];
    return Calendar.lDOMonth[monthNo];
  } else
    return Calendar.DOMonth[monthNo];
}

function Calendar_calc_month_year(p_Month, p_Year, incr) {
/*
Will return an 1-D array with 1st element being the calculated month and second
being the calculated year after applying the month incr/decr as specified
by 'incr' parameter. 'incr' will normally have 1/-1 to navigate thru the months.
*/
  var ret_arr = new Array();
  if (incr == -1) {
    if (p_Month == 0) {
      ret_arr[0] = 11;
      ret_arr[1] = parseInt(p_Year) - 1;
    } else {
      ret_arr[0] = parseInt(p_Month) - 1;
      ret_arr[1] = parseInt(p_Year);
    }
  } else if (incr == 1) {
    if (p_Month == 11) {
      ret_arr[0] = 0;
      ret_arr[1] = parseInt(p_Year) + 1;
    } else {
      ret_arr[0] = parseInt(p_Month) + 1;
      ret_arr[1] = parseInt(p_Year);
    }
  }
  return ret_arr;
}

// This is for compatibility with Navigator 3, we have to create and discard one object before the prototype object exists.
new Calendar();

Calendar.prototype.getMonthlyCalendarCode = function() {
  // Begin Table Drawing code here..
  var vCode = "<TABLE BORDER=0 WIDTH='230' height='145' CELLSPACING=0 CELLPADDING=2 BGCOLOR=\"" + this.gBGColor + "\">";
  return vCode + this.cal_header() + this.cal_data() + "</TABLE>";
}

Calendar.prototype.show = function() {
	this.gWinCal.document.open();
	// Setup the page...
	this.wwrite("<html><head><title>"+sCalendar+"</title>");
	this.wwrite("<link rel='stylesheet' href='/style/calendar.css' type='text/css'></head>");
	this.wwrite("<body leftmargin='0' rightmargin='0' topmargin='0' bottommargin='0' marginheight='0' marginwidth='0' ");
        this.wwrite("onload='opener.isShow="+isShow+";' onunload='if(opener && opener.enDate) opener.enDate();' onblur='self.focus();'>");
	this.wwrite("<TABLE WIDTH='230' height='175' BORDER=0 CELLSPACING=0 CELLPADDING=0><TR>");
	this.wwrite("<TD height='20' ALIGN=center class='calHeader' BGCOLOR='#7777CC'>"+this.gMonthName + " " + this.gYear + "</td></tr><tr><td>");
	// Show navigation buttons
	var prevMMYYYY = Calendar.calc_month_year(this.gMonth, this.gYear, -1);
	var prevMM = prevMMYYYY[0];
	var prevYYYY = prevMMYYYY[1];
	var nextMMYYYY = Calendar.calc_month_year(this.gMonth, this.gYear, 1);
	var nextMM = nextMMYYYY[0];
	var nextYYYY = nextMMYYYY[1];
        // fill header calendar comparing the check date
	this.wwrite("<TABLE WIDTH='230' BORDER=0 CELLSPACING=0 CELLPADDING=0 BGCOLOR='#eeeeee' height='20'><TR>");
        var sHead="<TD ALIGN=center class='calDays'";
        var currY=parseInt(this.gYear)-1;
        var currM=parseInt(this.gMonth);
            sHead += "><A HREF=\"javascript:window.opener.Build('" + this.gReturnItem +
                    "', '" + this.gMonth + "', '" + currY + "', '" + this.gFormat +
                    "');\">&lt; "+sYear+"<\/A></TD>";
        sHead+="<TD ALIGN=center class='calDays'";
          sHead +="><A HREF=\"javascript:window.opener.Build('" + this.gReturnItem +
                  "', '" + prevMM + "', '" + prevYYYY + "', '" + this.gFormat + "');\">&lt; "+sMonth+"<\/A></TD>";
        sHead+="<TD ALIGN=center class='calDays'";
          sHead += "><A HREF=\"javascript:window.opener.Build('" + this.gReturnItem +
                  "', '" + nextMM + "', '" + nextYYYY + "', '" + this.gFormat + "');\">"+sMonth+" &gt;<\/A></TD>";
        sHead+="<TD ALIGN=center class='calDays'";
        currY+=2;
          sHead += "><A HREF=\"javascript:window.opener.Build('" + this.gReturnItem +
                  "', '" + this.gMonth + "', '" + currY + "', '" + this.gFormat +
                  "');\">"+sYear+" &gt;<\/A></TD>";
	this.wwrite(sHead);
	this.wwrite("</TR></TABLE></td></tr><tr><td>");
	// Get the complete calendar code for the month..
	this.wwrite(this.getMonthlyCalendarCode());
	this.wwrite("</td></tr></TABLE></body></html>");
	this.gWinCal.document.close();
}

Calendar.prototype.wwrite = function(wtext) {
	this.gWinCal.document.writeln(wtext);
}

Calendar.prototype.cal_header = function() {
	var vCode = "";
	vCode += "<TR>";
	vCode += "<TD WIDTH='33' class='calWE'>"+Days[0]+"</TD>";
        for (var i=1;i<6;i++){
	  vCode += "<TD WIDTH='33' class='calWD'>"+Days[i]+"</TD>";
        }
	vCode += "<TD WIDTH='33' class='calWE'>"+Days[6]+"</TD>";
	vCode += "</TR>";
	return vCode;
}

Calendar.prototype.cal_data = function() {
	var vDate = new Date();
	vDate.setDate(1);
	vDate.setMonth(this.gMonth);
	vDate.setFullYear(this.gYear);
	var vFirstDay=vDate.getDay();
	var vDay=1;
	var vLastDay=Calendar.get_daysofmonth(this.gMonth, this.gYear);
	var vOnLastDay=0;
	var vCode = "";
//    var isMY=(parseInt(this.gMonth)==parsDate[1]-1) && (parseInt(this.gYear)==parsDate[2]);
	var isMY=false;

	/*
	Get day for the 1st of the requested month/year..
	Place as many blank cells before the 1st day of the month as necessary.
	*/

	vCode = vCode + "<TR>";
	for (i=0; i<vFirstDay; i++) {
		vCode = vCode + "<TD" + this.write_weekend_string(i) + ">";
                if (isNav) vCode = vCode +"&nbsp;";
                vCode = vCode +"</TD>";
	}

	// Write rest of the 1st week
	for (j=vFirstDay; j<7; j++) {
		vCode = vCode + "<TD align='center' " + this.write_weekend_string(j) + ">";
                if(isMY && ((isLess && vDay>parsDate[0]) || (!isLess && vDay<parsDate[0]))){
                  vCode +="<FONT COLOR=\"#999999\">" + vDay + "</FONT></TD>";
                } else {
		  vCode += "<A  HREF='#' " +
                  "onClick=\"self.opener.insDate('"+this.format_data(vDay)+"','"+ this.gReturnItem +"');\">" +
		  this.format_day(vDay) + "</A></TD>";
                }
		vDay=vDay + 1;
	}
	vCode = vCode + "</TR>";

	// Write the rest of the weeks
	for (k=2; k<7; k++) {
  	  vCode = vCode + "<TR>";
          for (j=0; j<7; j++) {
	    vCode = vCode + "<TD align='center' " + this.write_weekend_string(j) + ">";
            if(isMY && ((isLess && vDay>parsDate[0]) || (!isLess && vDay<parsDate[0]))){
              vCode +="<FONT COLOR=\"#999999\">" + vDay + "</FONT></TD>";
            } else {
	      vCode += "<A  HREF='#' " +
		"onClick=\"self.opener.insDate('"+this.format_data(vDay)+"','"+ this.gReturnItem +"');\">" +
		this.format_day(vDay) +	"</A></TD>";
            }
            vDay=vDay + 1;
            if (vDay > vLastDay) {
	      vOnLastDay = 1;
              break;
            }
	  }

	  if (j == 6)
            vCode = vCode + "</TR>";
	  if (vOnLastDay == 1)
	    break;
        }

	// Fill up the rest of last week with proper blanks, so that we get proper square blocks
	for (m=1; m<(7-j); m++) {
			vCode = vCode + "<TD" + this.write_weekend_string(j+m) +">";
                        if (isNav) vCode = vCode +"&nbsp;";
                        vCode = vCode +"</TD>";
	}
        if (j<6) vCode = vCode +"</TR>"
	return vCode;
}

Calendar.prototype.format_day = function(vday) {
	var vNowDay = gNow.getDate();
	var vNowMonth = gNow.getMonth();
	var vNowYear = gNow.getFullYear();

	if (vday == vNowDay && this.gMonth == vNowMonth && this.gYear == vNowYear)
		return ("<FONT COLOR=\"RED\"><B>" + vday + "</B></FONT>");
	else
		return (vday);
}

Calendar.prototype.write_weekend_string = function(vday) {
  // Return special formatting for the weekend day.
  for (var i=0; i<weekend.length; i++) {
    if (vday == weekend[i])
      return (" class='calWE'");
  }
  return "";
}

Calendar.prototype.format_data = function(p_day) {
	var vData='';
	var vMonth = 1 + this.gMonth;
	vMonth = (vMonth.toString().length < 2) ? "0" + vMonth : vMonth;
	var vMon = Calendar.get_month(this.gMonth).substr(0,3).toUpperCase();
	var vFMon = Calendar.get_month(this.gMonth).toUpperCase();
	var vY4 = new String(this.gYear);
	var vY2 = new String(this.gYear.substr(2,2));
	var vDD = (p_day.toString().length < 2) ? "0" + p_day : p_day;
        for ( var i=0;i<3;i++) {
	  switch (parsFormat[i]) {
            case "DD" :
              vData += vDD;
              break;
            case "MM" :
              vData += vMonth;
              break;
            case "MON" :
              vData += vMon;
              break;
            case "MONTH" :
              vData += vFMon;
              break;
            case "YYYY" :
              vData += vY4;
              break;
            case "YY" :
              vData += vY2;
          }
          if (i<2) vData+=parsDelims[i];
        }
	return vData;
}

function Build(p_item, p_month, p_year, p_format) {
	var p_WinCal = ggWinCal;
	gCal = new Calendar(p_item, p_WinCal, p_month, p_year, p_format);

	// Customize your Calendar here..
	gCal.gBGColor="white";
	gCal.gLinkColor="black";
	gCal.gTextColor="black";
	gCal.gHeaderColor="darkgreen";
        // fill calendar
        gCal.show();
}

function show_calendar() {
	/*
		p_month : 0-11 for Jan-Dec; 12 for All Months.
		p_year	: 4-digit year
		p_format: Date format (mm/dd/yyyy, dd/mm/yy, ...)
		p_item	: Return Item.
                p_left = left border of calendar layer;
                p_top = top border of calendar layer;
	*/

	p_item = arguments[0];
        p_left = arguments[1];
        p_top = arguments[2];
	if (arguments[3] == null)
		p_month = new String(gNow.getMonth());
	else
		p_month = arguments[3];
	if (arguments[4] == "" || arguments[4] == null)
		p_year = new String(gNow.getFullYear().toString());
	else
		p_year = arguments[4];
	if (arguments[5] == null)
		p_format = "MM/DD/YYYY";
	else
		p_format = arguments[5];

	var width = 230;
	var height = 210;
	vWinCal = window.open("", "Calendar","width="+width+",height="+height+",status=no,resizable=0,scrolling=no,top="+p_top+",left="+p_left);
	vWinCal.opener = self;
	ggWinCal = vWinCal;
	Build(p_item, p_month, p_year, p_format);
}