function updateClock ( )
{
  var currentTime = new Date ( );

  var currentHours = currentTime.getHours ( );
  var currentMinutes = currentTime.getMinutes ( );
  var currentSeconds = currentTime.getSeconds ( );
  var currentDay = currentTime.getDate();
  var korting = 24-currentHours;
  
  var tgH = 23 - currentHours;
  var tgM = 59 - currentMinutes;
  var tgS = 59 - currentSeconds;

  currentMinutes = ( currentMinutes < 10 ? "0" : "" ) + currentMinutes;
  currentSeconds = ( currentSeconds < 10 ? "0" : "" ) + currentSeconds;
  
  tgM = ( tgM < 10 ? "0" : "" ) + tgM;
  tgS = ( tgS < 10 ? "0" : "" ) + tgS;
  
  
  var currentTimeString = currentHours + ":" + currentMinutes + ":" + currentSeconds;
  var togoTimeString = tgH + " uur, " + tgM + " minuten en " + tgS+ " seconden ";

  if (currentDay==31) {
  	//document.getElementById("clock").firstChild.nodeValue = currentTimeString;
  	//document.getElementById("korting").firstChild.nodeValue = korting+' %';
  	if (document.getElementById("clock1")) {document.getElementById("clock1").firstChild.nodeValue = togoTimeString;}
  	if (document.getElementById("clock2")) {document.getElementById("clock2").firstChild.nodeValue = currentTimeString;}
  	if (document.getElementById("clock3")) {document.getElementById("clock3").firstChild.nodeValue = currentTimeString;}
  	if (document.getElementById("korting1")) {document.getElementById("korting1").firstChild.nodeValue = korting+' %';}
  	if (document.getElementById("korting2")) {document.getElementById("korting2").firstChild.nodeValue = korting+' %';}
  }
  
  if (currentDay==30) {
  	if (document.getElementById("clock1")) {document.getElementById("clock1").firstChild.nodeValue = togoTimeString;}
  	if (document.getElementById("clock10")) {document.getElementById("clock10").firstChild.nodeValue = togoTimeString;}
  	if (document.getElementById("clock2")) {document.getElementById("clock2").firstChild.nodeValue = currentTimeString;}
  	if (document.getElementById("korting1")) {document.getElementById("korting1").firstChild.nodeValue = korting+' %';}
  	//document.getElementById("korting").firstChild.nodeValue = korting+' %';
  }
  setTimeout("updateClock()",1000);
}

//updateClock();