function popupPhoto(src) {
	var photo = '<a href="#" onclick="closePopup(); return false"><img src="'+src+'" border="0" title="Klik om te sluiten"></a>';
	document.getElementById('popupcontent').innerHTML = photo;
	showPopup();
}

function closePopup() {
	document.getElementById('popupcontent').innerHTML = '';
	document.getElementById('popup').style.display = 'none';
}

function showPopup() {
	document.getElementById('popup').style.display = 'block';
}

function blurInput(input) {
	document.getElementById(input).style.backgroundImage = 'none';
}

function focusInput(input, image) {
	var inp = document.getElementById(input);
	if (inp.value == '') inp.style.backgroundImage = 'url(\'/images/'+image+'\')';
}