var streepjes = false;
var AllesGoed = true;  

function TransformDate(dDate, TypeOfCheck)
{

  AllesGoed = true;  
  var dDateValue = dDate.value;
  if (dDateValue == "")
  {
    AllesGoed = false;    
  }
    else
    {
      if ((!ControleerLengte(dDateValue)) && (AllesGoed))
      {
        AllesGoed = false;
      }
        else
        {
          if ((!CheckOpLetters(dDateValue)) && (AllesGoed))
          {
            AllesGoed = false;            
          }
            else
            {
              if ((!VoorAchter(dDateValue)) && (AllesGoed))
              {
                AllesGoed = false;
              }
                else
                {
                  if ((!TelStreepjes(dDateValue)) && (AllesGoed))
                  {
                    AllesGoed = false;
                  }
                    else
                    {                              
                      pos = dDateValue.indexOf("-");
                      if(pos == 2 && dDateValue.length == 8){
                        dDateValue = dDateValue.replace('-', '');
                        dDateValue = dDateValue.replace('-', '');
                        pos = -1;
                      }
                      if (pos >= 0)
                      {
                        streepjes = true;
                        if ((!CheckTussen(dDateValue)) && (AllesGoed))
                        {
                          AllesGoed = false;
                        }                        
                      }
                    }
                }
            }
        }
    }

    if (AllesGoed) 
    { 
      dDate.value = ControleerInvoer(dDateValue, TypeOfCheck)
      
      /*Check date */
      day   = parseInt(dDate.value.substring(0,2),10);
      month = parseInt(dDate.value.substring(3,5),10);
      year  = parseInt(dDate.value.substring(6,10),10);
	
      if( day < 1 || day > 31 )
      {
				dDate.value = "Ongeldig";
				return false;
      }
      switch( month )
      {
      	case 1:case 3:case 5:case 7:case 8:case 10:case 12:
			if( day > 31 )
			{
				dDate.value = "Ongeldig";
				return false;
			}
			break;
		case 4:case 6:case 9:case 11:
			if( day > 30 )
			{
				dDate.value = "Ongeldig";
				return false;
			}
			break;
		case 2:
			if ( (year % 4!=0) && ((year % 100==0) || (year % 400!=0)) ) //No Leap year
			{
				if( day > 28 )
				{
					dDate.value = "Ongeldig";
					return false;
				}
			}
			else //Leap Year
			{
				if( day > 29 )
				{
					dDate.value = "Ongeldig";
					return false;
				}
			}
			break;
		default:
			dDate.value = "Ongeldig";
			return false;
      }
 
      if( year < 1900 )
      {
      	dDate.value = "Ongeldig";
      	return false;
      }
     
      return true;
    }
    else 
    {
      dDate.value = "Ongeldig";
      return false;
    }
}

function ControleerLengte(dDate)
{
 if ((dDate.length < 6) || (dDate.length >= 11) || (dDate.length == 7) || (dDate.length == 9))
 {
   return false;
 }
   else
   { 
     return true;
   }
}

function CheckOpLetters(dDate)
{
  var doorgaan = true;
  var AllesOke = true;
  
  for (i=0;i<dDate.length;i++)  
  {
    if (!(((dDate.charAt(i) >= 0) && (dDate.charAt(i) <= 9)) || (dDate.charAt(i) == "-"))) 
    //wanneer er GEEN getal tussen de 0 en 9 staat of er staat GEEN streepje of een "/",
    //dan is het fout, en moet er gestopt worden
    {
      doorgaan = false;
      AllesOke = false;
      break;
    }
    if (!doorgaan) break;
  }
  if (AllesOke)
  {
    return true;
  }
    else
    {
      return false;
    }
}


function VoorAchter(dDate)
{
  if ((dDate.charAt(0) == "-") || ((dDate.charAt(dDate.length)-1) == "-")) 
  {
    return false;
  }
    else
    {
      return true;
    }
}

function TelStreepjes(dDate)
{
  var teller = 0;
  var antwoord;
  
  for (i=0;i<dDate.length;i++)
  {
    if (dDate.charAt(i) == "-")
    {
      teller++;
    }
  }
  
  if (teller == 0 || teller == 2)
  {
    return true;
  }
  else
  {
    return false;
  }     
}


function CheckTussen(dDate)
{
  var rest,rest2;
  var aantal;
  var i,j;
  
  i = dDate.indexOf("-");
  rest = dDate.substr(i+1,dDate.length);
  j = rest.indexOf("-");
  rest2 = rest.substr(j+1,dDate.length);
  aantal = rest2.length;
    
  if ((((i==1 || i==2)) && ((j==1 || j==2))) && (aantal == 2 || aantal == 4))
  {
    return true;
  }
    else
    {
      return false;
    }  
}


function ControleerInvoer(dDate, CheckType)
{
  var AllesGoed = true;
  aantalkar = dDate.length;  
  if ((streepjes) && (AllesGoed))
  {
    switch (aantalkar)
    {   
      case 6 : dDate = ms(dDate); break;
      case 8 : dDate = ms(dDate); break;
    }
  }
  else
  {
    if (AllesGoed)
    switch (aantalkar)
    {
      case 6 : //if (dDate.substr(2,5)>=2002) dDate = zssp(dDate);
               //else dDate = zs(dDate);
               dDate = zs(dDate);
               break;
      case 8 : dDate = zs(dDate); break; 
    }
  }
  AllesGoed = true;
  streepjes = false;
  
  if (CheckType == 1)
  {
       Nu = GetCurrentDate();
       NuJaar = parseInt(Nu.substr(0,4),10)
       xJaar = parseInt(dDate.substr(6,4),10)
       
       if (xJaar > NuJaar)
       {
          RestJaar = dDate.substr(8,2)
          temp = dDate.substr(0,6);
          dDate = temp + "19" + RestJaar
       }
  }
  
  return dDate;
}
function zs(dDate)
{
  var links,rechts;
  links = dDate.substr(0,2);
  if (aantalkar == 6){rechts = dDate.substr(2,6);}
  if (aantalkar == 8){rechts = dDate.substr(2,7);}  
  links=links+"-";
  dDate=links+rechts;
  links = dDate.substr(0,5);
  
  if (aantalkar == 6)
  {
    rechts = dDate.substr(5,6);
    links = links+"-20";    
  }
    else
    {
      if (aantalkar == 8)
      {
        rechts = dDate.substr(5,8);
        links = links+"-";
      }
    }
  dDate=links+rechts;
  return dDate;
}

function GetCurrentDate()
{
     var datum= new Date(), Day, Month, Year, CurrentDate

	Day=datum.getDate().toString();
	Month=datum.getMonth()+1;
	Month=Month.toString();
	Year=DetectNS()?(datum.getYear()+1900).toString():datum.getYear().toString();
	
	if (Day.length==1) Day="0"+Day;
	if (Month.length==1) Month="0"+Month;
	if (Year.length==2)Year="20"+Year;
	
	CurrentDate = Year +  Month +  Day
	
	return CurrentDate;
}
function DetectNS()
{
     var agt=navigator.userAgent.toLowerCase();
     var is_major = parseInt(navigator.appVersion);
     var is_minor = parseFloat(navigator.appVersion);
     var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1) && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1) && (agt.indexOf('webtv')==-1));
	if (is_nav) return true;
}

function ms(dDate)
{
  var aantalkar;
  if (dDate.charAt(2) == "-")
  {
    links = dDate.substr(0,6);
    rechts = dDate.substr(6,7);
    links = links+"20";
    dDate=links+rechts;    
  }  
    else
    {
      var links,rechts;
      dDate = "0"+dDate;
      links = dDate.substr(0,3);
      rechts = dDate.substr(3,6);
      links=links+"0";
      dDate=links+rechts;
      aantalkar = dDate.length;
      if (aantalkar == 8)
      {
        links = dDate.substr(0,6);
        rechts = dDate.substr(6,7);
        links = links+"20";
        dDate=links+rechts;
      }
    }
  return dDate;
}      

function zssp(dDate)
{
  var deel1,deel2,deel3;
  deel1 = dDate.charAt(0);
  deel2 = dDate.charAt(1);
  deel3 = dDate.substr(2,5);
  deel1="0"+deel1+"-";
  deel2="0"+deel2+"-";
  dDate=deel1+deel2+deel3;
  return dDate;
}