//urvashi -  latest 16 May 2003
currentDate = new Date();

var day_dt  = currentDate.getDate();
var mnth_dt = currentDate.getMonth();
var year_dt = currentDate.getFullYear();

var DateCtrl
var MonthCtrl
var YearCtrl


function Generate_date(stdt,stmnth,styr,DtCtrl,MnthCtrl,YrCtrl,days)
 { 
 //stdt     =  OPTIONAL Date which you want to be selected, if blank shows current date
 //stmnth   =  OPTIONAL Month which you want to be selected, if blank shows current date 
 //styr     =  OPTIONAL Year which you want to be selected, if blank shows current Year format::2004(4 digit)
 //DtCtrl   =  MANDATORY Name of the object in the format::document.formname.controlname
 //MnthCtrl =  MANDATORY Name of the object in the format::document.formname.controlname
 //YrCtrl   =  MANDATORY Name of the object in the format::document.formname.controlname
 //days     =  OPTIONAL ex:-for dispalying (end date =start date + 'days'), pass how many days should be added to start date 
 
 
    DateCtrl=DtCtrl
    MonthCtrl=MnthCtrl
    YearCtrl=YrCtrl
    
    //var startNumber='2003'
    var startNumber=year_dt
    var new_year_dt = year_dt+4
    var endNumber=new_year_dt
        
    if (stdt  == "")  {stdt  = day_dt}
    if (stmnth== "")  {stmnth= mnth_dt}
    if (styr  == "")  {styr  = year_dt}
    
 
    if (days!=null &&  days!='' && days!='undefined')
    {
        var newDay =  day_dt+days;
        currentDate.setDate(newDay);
        stdt  = currentDate.getDate();
        stmnth= currentDate.getMonth();
        styr  = currentDate.getYear();
    }
//    alert (stdt+" 3- "+stmnth+" - " +styr+" -days " +days)    

    writeDaysOptions(stdt,stmnth,styr)
    writeMonthOptions(stmnth)
    writeOptions(startNumber, endNumber,styr)
 }
 
   
function writeMonthOptions(selectedMnth)
 {
 
    MonthCtrl.length=0
    var optionCtr=0; 
    var theMonth1 = new Array("January","February","March","April","May","June","July","August","September","October","November","December")
    for (var optionCounter = 0; optionCounter < 12; optionCounter++)
    {   
        MonthCtrl.options[optionCounter] = new Option(parseInt(optionCounter));
        MonthCtrl.options[optionCounter].text =theMonth1[optionCounter];
        MonthCtrl.options[optionCounter].value=parseInt(optionCounter);
        if (parseInt(selectedMnth)==optionCounter){var optionCtr=optionCounter;}
    }
  
  MonthCtrl.options[selectedMnth].selected = true;  
  
 }

function writeOptions(startNumber,endNumber,selectedYr)
 {
   YearCtrl.length=0
   var optionCtr=0; 
   var endVal =  ( parseInt(endNumber)-parseInt(startNumber) )
   var mYear = parseInt(startNumber)
   
   for (var optionCounter = 0; optionCounter <= endNumber; optionCounter++)
      {
        if (mYear<=parseInt(endNumber))
        {
            YearCtrl.options[optionCounter] = new Option(parseInt(optionCounter));
            YearCtrl.options[optionCounter].text =parseInt(mYear);
            YearCtrl.options[optionCounter].value=parseInt(mYear);
            if (parseInt(selectedYr)==mYear){var optionCtr=optionCounter;}
            mYear=mYear+1
        }
        
      }
    YearCtrl.options[optionCtr].selected = true;
 
 }

function writeDaysOptions(selectedDay,selectedMnth,SelectedYear)
 {
   DateCtrl.length=0
   var optionCtr=0; 
   var DaysInMonth = GetDaysInMonth(selectedMnth,SelectedYear)
   for (var optionCounter = 0; optionCounter <= DaysInMonth ; optionCounter++)
   {
        DateCtrl.options[optionCounter] = new Option(parseInt(optionCounter));
        DateCtrl.options[optionCounter].text =parseInt(optionCounter);
        DateCtrl.options[optionCounter].value=parseInt(optionCounter);
      
      if (selectedDay==optionCounter){var optionCtr=selectedDay;}
   }
   //if (selectedDay>DaysInMonth){selectedDay==DaysInMonth}
   DateCtrl.options[optionCtr].selected = true;
   //DateCtrl.Options.Remove(0);
 }


function GetDaysInMonth(int_month,int_year)
{
   if (parseInt(int_month)==11 )
        {
        var new_month = 0
        var new_year_calc =parseInt(int_year)+1 ;
        }
    else if (int_month!=11 )
        {
        var new_month = parseInt(int_month)+1;
        var new_year_calc =parseInt(int_year);
        }

    //to gets the number of days in the current month
   
    date1=new Date(int_year,int_month,1);
    date2=new Date(new_year_calc,new_month,1);
   
   // alert("date1="+date1+" date2="+date2)
   
   var days_curr_month =(date2.valueOf() - date1.valueOf())/86400000;
  if (parseInt(int_month)==2 )
  {
      days_curr_month="31"
  }
   
   return days_curr_month;
}


function ChkVal(stdt,stmnth,styr,eddt,edmnth,edyr,NoOfNights,ValueIn)
    {// ValueIn is a Flag to check text box has changed 
     // if ValueIn>'' it will cal end dt else replace the no of nights    
        
        NoNights = parseInt(NoOfNights.value)
        var mstr = NoOfNights.value;
        if (NoOfNights.value.length>0)
        {
        var str = "1234567890";
        var cnt=0;
        var cnt1=0;  
        for ( i=0;i<mstr.length;i++)
        {
            if (str.indexOf(mstr.charAt(i))==-1)
              { 
                alert ("Please enter numeric values");
                NoOfNights.value="0";
                NoOfNights.focus();
                return false;
              }
        }  //for  
        }// 

        
        date1=new Date(styr.value,stmnth.value,stdt.value);
        date2=new Date(edyr.value,edmnth.value,eddt.value);
        
        //if (date1.valueOf() > date2.valueOf())
        //{
           //   NoOfNights.value=0;
        //}
        //else
        {
            
          var DiffDays = parseInt((date2.valueOf()-date1.valueOf())/86400000)
            //alert(ValueIn)
            if ((ValueIn>'') && (NoOfNights.value.length>0))
            {
                var newDays = date1.setDate(date1.getDate()+NoNights)
                var newDate = new Date(date1.getFullYear(),date1.getMonth(),date1.getDate() ) 
                               
                if (edyr.length>0)
                {   DepYrLen=parseInt(edyr.length)-1; 
                    
                    var LastDepYr = edyr[DepYrLen].value
                  
                    if ( newDate.getFullYear() > LastDepYr )
                    {
                        alert("Please reduce number of nights.\nNew year("+ newDate.getFullYear()+") is greater than the maximum year in departure date("+LastDepYr+")!")
                        NoOfNights.value = 0
                        return false;
                    }
                    else
                    {
                        eddt.options[newDate.getDate()-1].selected = true;
                        edmnth.options[newDate.getMonth()].selected = true;
                        var optr=0;
                        for (i=0;i<=DepYrLen;i++)
                        {
                            /* Urvashi edited this for CR 2762 */
                            if ( parseInt(edyr.options[i].value)== parseInt(newDate.getFullYear()) )
                            {
                                   optr= i
                            }  
                        }
                        edyr.options[optr].selected =true;
                        
                    }// chking for max yr in dep year
               }//if dep.length>0
               
            }
            else
            {
                
                if (DiffDays>0)
                {NoOfNights.value = DiffDays}
                else 
                {
                    
                    NoOfNights.value = 0
                    /* Urvashi added for CR 2819*/
                    eddt.options[date1.getDate()-1].selected = true;
                    edmnth.options[date1.getMonth()].selected = true;
                    var optr=0;
                    DepYrLen=parseInt(edyr.length)-1; 
                    for (i=0;i<=DepYrLen;i++)
                    {
                        
                        if ( parseInt(edyr.options[i].value)== parseInt(date1.getFullYear()) )
                        {
                               optr= i
                        }  
                    }
                    edyr.options[optr].selected =true;
                    /* Urvashi added for CR 2819*/
                }
                
            }// noofnight=diff betn 2 dates
        }// if dt1>dt2
        
    }