function swapImg(imgId, nImg){
  document.getElementById(imgId).src = nImg;
}

function swapClass(nId, nClass){
  document.getElementById(nId).className = nClass;
}

function changeChecked(nParentId, nChecked){
  parentElement = document.getElementById(nParentId);
  aChildElements = parentElement.getElementsByTagName("input");
  i = aChildElements.length;
  
  for(var a=0; a<i; ++a){aChildElements[a].checked = nChecked;}
  
  if(nChecked == false){document.getElementById("selecteerAlle").checked = false;}
  else{                 document.getElementById("selecteerGeen").checked = false;}
}




function emptyElement(nId){
  var x = document.getElementById(nId);
  while(x.hasChildNodes()){
      x.removeChild(x.firstChild);
  }
}



function displayWinkels(nId, nStatus){
  if(nStatus != "show"){
    document.getElementById("winkel_overzicht"+nId).className = "winkels hidden";
  }else{
    document.getElementById("winkel_overzicht"+nId).className = "winkels";
  }
}