function getLayer(name) {

	if (is.ns && !is.ns5) {
		return(document.layers[name]);
	} else if (is.ie) {
		layer = eval('document.all.' + name + '.style');
		return(layer);
	} else if (is.ns5) {
		layer = document.getElementById(name).style;
		return(layer);
	} else return(null);
}

function showLayer(name,onoff) {
  var layer = getLayer(name);
  	if(is.ns){
  		vis = (onoff) ?  "show" : "hide";
  	}  else {
  		vis = (onoff) ?  "visible" : "hidden";
  	}
  	if(is.ns5){
  		vis = (onoff) ?  "visible" : "hidden";
  	}
	layer.visibility = vis;
}

function writeLayer(name,cont) {
  var layer = getLayer(name);
	if (is.ns && !is.ns5) {
		layer.document.open();
		layer.document.write(cont);
		layer.document.close();
	} else if (is.ie) {
		var str = "document.all." + name + ".innerHTML = '" + cont + "'";
    		eval(str);
	} else if (is.ns5) {
		layer.innerHTML=cont;
	}
}

//function readLayer(name,cont) {
//  var layer = getLayer(name);
//	if (is.ns && !is.ns5) {
//		layer.document.open();
//		return(layer.document.read());
//		layer.document.close();
//	} else if (is.ie) {
//		var str = "document.all." + name + ".innerHTML
//    		return(eval(str));
//	} else if (is.ns5) {
//		return(layer.innerHTML);
//	}
//}

function RollOver(type,etat){
	if (rubrik[0]+'x'+rubrik[1]==type) 
		{
		showLayer('menuOff'+type,etat);
		showLayer('menuOn'+type,!etat);
		}
	else
		{
		showLayer('menuOff'+type,!etat);
		showLayer('menuOn'+type,etat);
		}
}

function init(){
	showLayer('menuD'+rubrik[0]+'x'+rubrik[1],true);
	showLayer('menuOff'+rubrik[0]+'x'+rubrik[1],false);
	showLayer('menuOn'+rubrik[0]+'x'+rubrik[1],true);
}