function shownhide(id) {
	//alert("shownhide ["+id+"]");
	if(document.getElementById){
		if (document.getElementById(id).style.display == "block"){
			document.getElementById(id).style.display = "none";
		}else{
			if (document.getElementById(id).style.display == "none"){
				document.getElementById(id).style.display = "block";
			}
		}
	}
}

function lehrershownhide(id) {
	if(document.getElementById){
		var div = document.getElementById('mehr_' + id);
		// var link = document.getElementById('link_' + id);
		var arr = document.getElementById('arr_' + id);
		if (div.style.display == "block") {
			div.style.display = "none";
			// link.innerHTML = 'mehr ...';
			arr.src = "/templates_IDE/images/arr_down.gif";
			arr.alt = "mehr Details ...";
		} else if (div.style.display == "none") {
			div.style.display = "block";
			// link.innerHTML = 'weniger ...';
			arr.src = "/templates_IDE/images/arr_up.gif";
			arr.alt = "weniger Details ...";
		}
	}
}