// Funktionen zum ein/ausblenden der Layer

// Browsertest
var ie = document.all ? true : false;
var ns = document.layers ? true : false;
var ns6 = document.getElementById ? true : false;
// ***********

// Alle ausblenden und den gewählten Layer einblenden
function show_one_layer(layerNum){
//alert(ie+":"+ns+":"+ns6);
	hide_all_layer();
	layerVal=layerName+layerNum;
	if (ie) {
		document.all[layerVal].style.visibility = "visible";
	} else if (ns) {
		document.layers[layerVal].visibility = "show";
	} else if (ns6) {
		//document.getElementById(layer_val).style.visibility = "visible";
		var myelem= document.getElementById(layerVal);
		myelem.style.visibility = "visible";
//		alert(document.getElementById(layerVal).style.visibility);
	}
}

function hide_all_layer(){
	for (var i = 1; i <= maxLayer; i++)
		hide_layer(i);
}

function hide_layer(layerNum){
	layer_val=layerName+layerNum;
	if (ie) {
		document.all[layer_val].style.visibility = "hidden";
	} else if (ns) {
		document.layers[layer_val].visibility = "hide";
	} else if (ns6) {
		document.getElementById(layer_val).style.visibility = "hidden";
	}
}

function show_big(layerName,layerNavi){
	if (ie) {
		document.all[layerName].style.visibility = "visible";
	} else if (ns) {
		document.layers[layerName].visibility = "show";
	} else if (ns6) {
		document.getElementById(layerName).style.visibility = "visible";
	}
	if(layerNavi){
		if (ie) {
			document.all[layerNavi].style.visibility = "visible";
		} else if (ns) {
			document.layers[layerNavi].visibility = "show";
		} else if (ns6) {
			document.getElementById(layerNavi).style.visibility = "visible";
		}
	}
}
function hide_big(layerName,layerNavi){
	if (ie) {
		document.all[layerName].style.visibility = "hidden";
	} else if (ns) {
		document.layers[layerName].visibility = "hide";
	} else if (ns6) {
		document.getElementById(layerName).style.visibility = "hidden";
	}
	if(layerNavi){
		if (ie) {
			document.all[layerNavi].style.visibility = "hidden";
		} else if (ns) {
			document.layers[layerNavi].visibility = "hide";
		} else if (ns6) {
			document.getElementById(layerNavi).style.visibility = "hidden";
		}
	}
}