function addItem(id) {
	top.merkzettel.location.href='merkzettel.php?addItem='+id;
}

function delItem(id) {
	top.merkzettel.location.href='merkzettel.php?delItem='+id;
}

function changeItem(id) {

	var itemImage = top.document.getElementById(id);
	
	if (itemImage != null) {
		if (itemImage.src.indexOf('delete') == -1) {
			itemImage.src = 'images/merkzettel/note_delete.gif';
			addItem(id);
		}
		else {
			itemImage.src = 'images/merkzettel/note_new.gif';
			delItem(id);
		}
	}
	else {
		delItem(id);
	}
}


var defaultHeight      = 24;
var defaultWidth       = 180;
var defaultHeightOpen  = 500;
var defaultWidthOpen   = 400;

var showButton = '<img src="images/merkzettel/accept.png" border="0">';
var hideButton = '<img src="images/merkzettel/cancel.png" border="0" style="margin-right:8px;">';

function switchMerkzettel() {
	if (MerkzettelBlock != null) {
		if (parent.document.getElementById('merkzettel').height > defaultHeight) {
			MerkzettelSwitch.rewrite(showButton);
			hideMerkzettel();	
		}
		else {
			MerkzettelSwitch.rewrite(hideButton);
			showMerkzettel();
		}
	}
}

function showMerkzettel() {
	if (MerkzettelBlock != null) {
		parent.document.getElementById('merkzettel').style.border = 'solid 1px white';
		parent.document.getElementById('merkzettel').width  = defaultWidthOpen;
		parent.document.getElementById('merkzettel').height = MerkzettelBlock.getHeight();
	}
}

function hideMerkzettel() {
	if (MerkzettelBlock != null) {
		parent.document.getElementById('merkzettel').style.border = 'solid 0px white';
		parent.document.getElementById('merkzettel').width  = defaultWidth;
		parent.document.getElementById('merkzettel').height = defaultHeight;
	}
}

function initMerkzettel() {
	if (parent.document.getElementById('merkzettel').height > defaultHeight) {
		parent.document.getElementById('merkzettel').height = MerkzettelBlock.getHeight();
	}
}