function handleEnter (field, event) {
		var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
		if (keyCode == 13) {
			var i;
			for (i = 0; i < field.form.elements.length; i++)
				if (field == document.TelForm.Antwoord[i])
					break;
			i = (i + 1) % 10; //field.form.elements.length;
			document.TelForm.Antwoord[i].focus();
			return false;
		} 
		else
		return true;
	}    



function countdown(){

     i--;
     if(i==0){  
      	window.status="Nog "+i+" seconden";  
	document.TelForm.TelVeld.value="Nog "+i+" seconden"; 
        
	Controleer();
     } 
     else{
         if(i!=1){
	     document.TelForm.TelVeld.value="Nog "+i+" seconden";  
             window.status="Nog "+i+" seconden";  
	     
         }
         else{
             document.TelForm.TelVeld.value="Nog 1 seconde";  
	     window.status="Nog 1 seconde";  
	  
         }
     start = setTimeout(countdown,100);
     }  
 }



function secondscount(){

     i--;
     if(i==0){  
      	window.status="Nog "+i+" seconden";  
	document.TelForm.TelVeld.value="Nog "+i+" seconden"; 
        
	Controleer();
     } 
     else{
         if(i!=1){
	     document.TelForm.TelVeld.value="Nog "+i+" seconden";  
             window.status="Nog "+i+" seconden";  
	     
         }
         else{
             document.TelForm.TelVeld.value="Nog 1 seconde";  
	     window.status="Nog 1 seconde";  
	  
         }
     start = setTimeout(secondscount,1000);
     }  
 }



function getStyleObject(objectId) {
  // checkW3C DOM, then MSIE 4, then NN 4.
  //
  if(document.getElementById && document.getElementById(objectId)) {
	return document.getElementById(objectId).style;
   }
   else if (document.all && document.all(objectId)) {  
	return document.all(objectId).style;
   } 
   else if (document.layers && document.layers[objectId]) { 
	return document.layers[objectId];
   } else {
	return false;
   }
}


function changeObjectVisibility(objectId, newVisibility) {
    // first get the object's stylesheet
    var styleObject = getStyleObject(objectId);

    // then if we find a stylesheet, set its visibility
    // as requested
    //
    if (styleObject) {
	styleObject.visibility = newVisibility;
	return true;
    } else {
	return false;
    }
}

function hideAll()
{
   changeObjectVisibility("ez","hidden");
}

function switchDiv(div_id)
{
  var style_sheet = getStyleObject(div_id);
  if (style_sheet)
  {
    hideAll();
    changeObjectVisibility(div_id, "visible");
  }
  else 
  {
    alert("Sorry, alleen ondersteund in browsers met Dynamic HTML");
  }
}