var currentImg = 0;
function switchImg(imgNo) {
	if (imgNo >= 0 && imgNo <= imgList.length-1) {
		document.getElementById('localimg').src = imgList[imgNo];
		document.getElementById('localimg').alt = imgText[imgNo];
		document.getElementById('localimg').title = imgText[imgNo];
		currentImg = imgNo;
		if (imgNo > 0) {
			document.getElementById('browseprev').src = '/images/leftarrow.gif';
			document.getElementById('browseprev').style.cursor = 'pointer';
		}
		else {
			document.getElementById('browseprev').src = '/images/leftarrowna.gif';
			document.getElementById('browseprev').style.cursor = 'auto';
		}
		if (imgNo < imgList.length-1) {
			document.getElementById('browsenext').src = '/images/rightarrow.gif';
			document.getElementById('browsenext').style.cursor = 'pointer';
		}
		else {
			document.getElementById('browsenext').src = '/images/rightarrowna.gif';
			document.getElementById('browsenext').style.cursor = 'auto';
		}
	}
}
function nextImg() {
	switchImg(currentImg+1);
}
function prevImg() {
	switchImg(currentImg-1);
}

function showLargeImg() {
	document.getElementById('largeimg').src = document.getElementById('localimg').src;
	document.getElementById('largeimg').alt = document.getElementById('localimg').alt + ' (zum Schließen anklicken)';
	document.getElementById('largeimg').title = document.getElementById('localimg').title + ' (zum Schließen anklicken)';
	document.getElementById('largeimg').style.visibility = 'visible';
}
function hideLargeImg() {
	document.getElementById('largeimg').style.visibility = 'hidden';
}