function changeOpac(opacity, id) {
	var object = document.getElementById(id).style;
	object.opacity = (opacity / 100);
	object.MozOpacity = (opacity / 100);
	object.KhtmlOpacity = (opacity / 100);
	object.filter = "alpha(opacity=" + opacity + ")";
}

function blendimage(divid, imageid, imagefile, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	
	document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";
	
	changeOpac(0, imageid);
	
	document.getElementById(imageid).src = imagefile;

	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
	}
}

function blenden() {
	/*cur++;
	if(cur == 19) {
		cur -= 18;
	}*/
	cur = Math.round(Math.random()*sfeeraantal) + 1;
	blendimage('blenddiv','blendimage', prefix + 'images/media/sfeer/' + sfeerdir + cur + '.jpg',1000);
	setTimeout("blenden()",5000);
}







function rowhigh(row,big_image) {
	row.className = "high";
	if (big_image!=undefined) {
		document.getElementById('big_image').src = prefix+"images/admin_icons/"+big_image+"_big.gif";
	}
}
function rowlow(row) {
	row.className = "low";
}
function adminIndexResetImage() {
	document.getElementById('big_image').src = prefix+"images/package_network.gif";
}
function setCheckboxColumn(theCheckbox){
	theCheckbox = 'nodes[' + theCheckbox + ']';
	document.getElementById(theCheckbox).checked = (document.getElementById(theCheckbox).checked ? false : true);
}
function checkdel(formdel) {
	if (formdel.action.value=="delete") {
		if(confirm("Weet u zeker dat u de geselecteerde pagina's wilt verwijderen? Deze actie is onomkeerbaar. Selecteer bij het verwijderen van pagina's met dochterpagina's ook de dochterpagina's!")) {
			return true;
		}
		else {
			return false;
		}
	}
}
function changeFilter(obj) {
	if (document.all) {
		newFilter = obj.options[obj.selectedIndex].value;
	}
	else {
		newFilter = obj.value;
	}
	document.location = '?filter='+newFilter;
}



/* AJAX */
function createRequestObject() {
		var ro;
		var browser = navigator.appName;
		if(browser == "Microsoft Internet Explorer"){
				ro = new ActiveXObject("Microsoft.XMLHTTP");
		} else{
				ro = new XMLHttpRequest();
		}
		return ro;
}

var http = createRequestObject();

function toggle_fotos(path,curnav,generate_thumbs) {
	document.getElementById('picsres').style.display='none';
	document.getElementById('loading').style.display='block';
	http.open('get', prefix+'db.php?type=fotos&p='+path+'&cn='+curnav+'&gt='+generate_thumbs);
	http.onreadystatechange = handleResponseFotos;
	http.send(null);
}

function handleResponseFotos() {
	if (http.readyState == 4) {
		document.getElementById('picsres').innerHTML = http.responseText;
		document.getElementById('loading').style.display='none';
		document.getElementById('picsres').style.display='block';
	}
}