function shown(id,title,autor,desc) {
  
	        var Layer = document.getElementById(id);
		
		desc_edited = desc;
		
		if (desc.length > 300){
			desc_edited = desc.substr(0,300);
			desc_edited = desc_edited + " [...]";
		}
	        var teaser = "<b>" + title + "</b>" + "<br>" + autor + "<br><br>" + desc_edited;
	
		Layer.innerHTML = teaser;

	    }
  
  
function show(id,title,autor,desc) {
  
	        var Layer = document.getElementById(id);
	        var myTitle = document.createElement("b");
	
	        myTitle.appendChild(document.createTextNode(title));
	    
	    
	        Layer.appendChild(myTitle);
	        Layer.appendChild(document.createElement("br"));
		Layer.appendChild(document.createTextNode(autor));
	        Layer.appendChild(document.createElement("br"));
	        Layer.appendChild(document.createElement("br"));
	        Layer.appendChild(document.createTextNode(desc));
		
		Layer.style.visibility = 'visible';

}
			        
function hide(id) {
				
	        var Layer = document.getElementById(id);
	        var LayerOff = Layer.cloneNode(false);
					
	        Layer.parentNode.replaceChild(LayerOff,Layer);
		
		Layer.style.visibility = 'hidden';
}