function pages(id_cur,id_next){

// 	var e_cur = document.getElementById(id_cur);
// 	var e_next = document.getElementById(id_next);

	switch_edit(id_cur);
	switch_edit(id_next);
}


function switch_edit(id,schalter){
	var e = document.getElementById(id);

	if (schalter){
// console.log(id,schalter);
		switch (schalter){
			case "0":
// 				console.log("Unsichtbar");
				e.style.display = "none";
				break;
			case "1":
// 				console.log("Sichtbar");
				e.style.display = "block";
				break;
		}
	}else{
		if (e.style.display == "block"){
			e.style.display = "none";
		}else{
			e.style.display = "block";
		}
	}
}

function popup(datei){
	fenster = window.open(datei, "Popup", "width=400, height=450, scrollbars");
	fenster.focus();
}