var vis = new Array(8);

function showMenu(no) {
	var p = document.getElementById("b_"+no);
	var debug = document.getElementById("debug");
	if (p) p.className=no>0?"navi_cell_selected":"navi_home_selected";	
	var menu = document.getElementById("navi_sub_"+no);
	if (!menu || !vis[no]) {
	    vis[no]=5;
	    for (var i=0; i<vis.length; i++) {
	        if (i!=no) {
		      vis[i]=1;
		      hideMenu(i, -1);
	        }
	    }
 	    if (menu) {
		document.getElementById("navi_spacer").className="navi_sub_hidden";
		menu.className="navi_sub_shown";
	    } else {
		document.getElementById("navi_spacer").className="navi_sub_shown";
	    }
	} else {
	   vis[no]=5;
	}
}

function butLeft(idx) {
	var menu = document.getElementById("navi_sub_"+idx);
	if (!menu || vis[idx]==0) {
		menu = document.getElementById("b_"+idx);
		if (menu) menu.className=idx>0?"navi_cell":"navi_home";
	} else {
		hideMenu(idx, 500);
	}
}

function hideMenu(idx, timeout) {
	if (timeout<=0) {
		if (vis[idx]==1) {
			vis[idx]=0;
			var menu = document.getElementById("navi_sub_"+idx);
			if (menu) {
				menu.className="navi_sub_hidden";			
			}
			butLeft(idx);
			if (timeout==0) {
				document.getElementById("navi_spacer").className="navi_sub_shown";
			}
		}
	} else {
		vis[idx]=1;
		setTimeout("hideMenu("+idx+", 0)", 1000);
	}
}

function checkFields(form) {
	for (var i=0; i<form.elements.length; i++) {
		if (form.elements[i].value.length==0) {
			if (form.elements[i].id && form.elements[i].id.lastIndexOf('.')>0) {
				alert("Wir benötigen die Angabe "+form.elements[i].id);
				return false;
			}
		}
	}
	return true;
}