function checkImage(frm){
	if(frm.thumb.value == ""){
		alert('Je moet een "thumbnail" toevoegen!')
		return false;
	}else if(frm.thumb_hover.value == ""){
		alert('Je moet een "thumbnail actief" toevoegen!')
		return false;
	}else{
		return true;
	}
}

function hideFlash(){
	if(document.getElementById('flashMessage')){
		Effect.toggle('flashMessage','appear', {duration: 0.5})
	}
}

function startFlashHide(){
	setTimeout('hideFlash()', 3000);
}

/*
var totalImages = 0;
var currentImage = 0;
var prevImage = 0;

function nextImage(totalImg){
	totalImages = totalImg;
	currentImage++;
	prevImage = currentImage - 1;
	
	document.getElementById('img'+currentImage).style.display='block';
	document.getElementById('img'+prevImage).style.display='none'
	
	checkButtons();
}

function previousImage(totalImg){
	totalImages = totalImg;
	currentImage--;
	prevImage = currentImage + 1;
	
	document.getElementById('img'+currentImage).style.display='block';
	document.getElementById('img'+prevImage).style.display='none';
	
	checkButtons();
}

function checkButtons(){
	if(currentImage >= totalImages - 1){
		document.getElementById('next').style.display='none';
	}else{
		document.getElementById('next').style.display='block';
	}
	
	if(currentImage == 0){
		document.getElementById('prev').style.display='none';
	}else{
		document.getElementById('prev').style.display='block';
	}
}
*/