var prevpic;
var nextpic;
var imageAndText = new Array();
function getImageConfig(imageconfig){
	imageAndText = imageconfig.split("|");
	if(imageconfig == '' || imageAndText[0] == ''){
		alert('error: keine valide Bildkonfiguration!');
		document.getElementById('prev').style.display = 'none';
		document.getElementById('next').style.display = 'none';	
		document.getElementById('d').firstChild.data = '';
		document.getElementById('image').style.display = 'none';	
	}	
}
function loadImages(currentpic){
	l = imageAndText.length/2;
	prevpic = currentpic-1;
	nextpic = currentpic+1;
	if(currentpic < 0 || currentpic > l-1){
		alert('error: keine valide Bildkonfiguration!');
	}else if(currentpic == 0 && l == 1){
		document.getElementById('prev').style.display = 'none';
		document.getElementById('next').style.display = 'none';
	}else if(currentpic == 0){
		document.getElementById('prev').style.display = 'none';
		document.getElementById('next').style.display = '';
	}else if(currentpic == l-1){
		document.getElementById('next').style.display = 'none';
		document.getElementById('prev').style.display = '';
	}else{
		document.getElementById('next').style.display = '';
		document.getElementById('prev').style.display = '';
	}
	
	document.getElementById('next').onClick = 'javascript:loadImages(' + nextpic + ')';
	
	document.getElementById('image').src = imageAndText[currentpic*2];
	document.getElementById('d').firstChild.data = imageAndText[currentpic*2+1];
}
function showPrev(){
	loadImages(prevpic);
}
function showNext(){
	loadImages(nextpic);
}