window.onload = function(){
biolongshort();
}

function biolongshort(){
	var togglelink = document.getElementById("toggle");
	var long = document.getElementById("long");
	var longtext = long.innerHTML;
	var longmonth = document.getElementById("longmonth");
	long.style.display = "none";
	longmonth.style.display = "none";
	var pdf = document.getElementById("pdf");
	var undertitel = document.getElementById("undertitel");
	var undertiteltext = undertitel.innerHTML;
	
		togglelink.onclick = function(){
			if(undertitel.innerHTML.length <= undertiteltext.length ){
				undertitel.innerHTML = longtext;
				togglelink.innerHTML = "back..."
				pdf.style.display = "none";
				}
			else{
				undertitel.innerHTML = undertiteltext;
				togglelink.innerHTML = "read more...";
				pdf.style.display = "block";
			}
		}
}