// *****************************************************************************
// * explanation
// *****************************************************************************
function changeCheckbox(obj) {
  if (document.getElementById(obj).checked) document.getElementById(obj).checked = false;
	else document.getElementById(obj).checked = true;

	checkDoubles(document.getElementById(obj));
}

// *****************************************************************************
// * explanation
// *****************************************************************************
function checkDoubles(obj) {
  var objNumber, objName;

  if (!isNaN(obj.id.substr(obj.id.length-2,1))) {
	  objNumber = obj.id.substr(obj.id.length-2,1);
		objName = obj.id.substr(0,obj.id.length-2);
	}
	else {
	  objNumber = obj.id.substr(obj.id.length-1,1);
		objName = obj.id.substr(0,obj.id.length-1);
	}

	
	if(objName == "resultTransfer" && obj.checked){ 
		document.getElementById("resultHostingonly" + objNumber).checked = false;
		document.getElementById("resultWatchdog" + objNumber).checked = false;
	}
	if(objName == "resultHostingonly" && obj.checked){
		document.getElementById("resultTransfer" + objNumber).checked = false;
		document.getElementById("resultWatchdog" + objNumber).checked = false;
	}
	if(objName == "resultWatchdog" && obj.checked){
		document.getElementById("resultHostingonly" + objNumber).checked = false;
		document.getElementById("resultTransfer" + objNumber).checked = false;
	}
}

// *****************************************************************************
// * explanation
// *****************************************************************************
function checkOutput() {
  var objForm = document.getElementById('resultForm');
  var objEl = null;
  var x = 0;
  var count = 0;

  // for each element on the form
  for (x=0; x<objForm.elements.length; x++) {
    objEl = objForm.elements[x];

    if (objEl.type == 'checkbox' && objEl.checked == true){
      count++;
    }
    if (objEl.type == 'radio' && objEl.checked == true){
      count++;
    }
  }

  if (count>0) { 
    document.getElementById('resultForm').submit();
  } else {
    alert('U heeft geen domein geselecteerd.\n Gelieve er minstens één te selecteren en daarna verder te gaan.');
  }
}