function blockout(id) {
	obj = document.getElementsByTagName("div");
	obj2 = document.getElementsByTagName("li");
    if (id=="sommerpreise"){
		obj["sommerpreise"].style.display = 'block';
		obj["winterpreise"].style.display = 'none';
		obj2["nav_sommer"].className = 'aktiv';
		obj2["nav_winter"].className = '';
    }
    else {
		obj["sommerpreise"].style.display = 'none';
		obj["winterpreise"].style.display = 'block';    
		obj2["nav_sommer"].className = '';
		obj2["nav_winter"].className = 'aktiv';
	}
}

function moretext(id) {
	obj = document.getElementsByTagName("div");
    if (obj[id].style.display == 'block'){
    obj[id].style.display = 'none';
    }
    else {
    obj[id].style.display = 'block';
    }
}