var nivaaet1 = 'no';
var nivaaet2 = 'no';
var nivaaet3 = 'no';

function setNivaa(nr, verdi){
	if(nr=='1'){
		nivaaet1=verdi;
	}
	else if(nr=='2'){
		nivaaet2=verdi;
	}
	else if(nr=='3'){
		nivaaet3=verdi;
	}
}

function menuOut(menynr,meny,barn){
	if(barn=='ja' && eval(menynr)=='no' && eval(meny)=='no'){
		if(menynr.substring(0,2)=='mm' && nivaaet3=='no'){
			
			return null;
		}
		else if(nivaaet3=='no'){
			if(document.getElementById(menynr)){
				document.getElementById(menynr).style.visibility='hidden';
			}
		}
	}
}

function menuOut3(menynr,meny){
	if(eval(menynr)=='no' && eval(meny)=='no' && nivaaet2=='no'){
		document.getElementById(menynr).style.visibility='hidden';
		
		if(menynr.substring(3,4)=='_'){
				var neste = 'm'+menynr.substring(2,3);
				document.getElementById(neste).style.visibility='hidden';
		}
		else if(menynr.substring(4,5)=='_'){
			var neste = 'm'+menynr.substring(2,4);
			document.getElementById(neste).style.visibility='hidden';
		}
	}
}

function menuOut4(menynr,meny,barn){	
	if(nivaaet1=='yes'){
		var neste = '';
		var i=0;
		for(i=0;i<barn.length;i++){
			neste = 'm'+menynr+'_'+barn[i];
			if(document.getElementById(neste)){
				document.getElementById(neste).style.visibility='hidden';
			}
		}	
	}
	if(eval(menynr)=='no' && eval(meny)=='no' && nivaaet3=='no'){
		if(document.getElementById(menynr)){
			document.getElementById(menynr).style.visibility='hidden';
		}
		var i=0;
		for(i=0;i<barn.length;i++){  
			neste = 'm'+menynr+'_'+barn[i];
			if(document.getElementById(neste)){
				document.getElementById(neste).style.visibility='hidden';
			}
		}	
	}
}

function fjern(menynr,barn_foran,barn_bak){
	var nr = menynr.slice(1);
	var nr2 = menynr.slice(1);
	if(barn_foran=='ja'){
		var en = parseInt(nr)-1;
		menynr2 = 'm'+en;
		document.getElementById(menynr2).style.visibility='hidden';
	}
	if(barn_bak=='ja'){
		var to = parseInt(nr2)+1;
		menynr3 = 'm'+to;
		document.getElementById(menynr3).style.visibility='hidden';
	}
}

function fjern2(menynr,antall_elementer){
	if(menynr.substring(3,4)=='_'){
		var t = menynr.slice(4);
		if(t=='1'){			
			menynr3 = menynr.substr(0,4)+'2';
			if(document.getElementById(menynr3)){
				document.getElementById(menynr3).style.visibility='hidden';
			}
		}
		else if(t==antall_elementer){
			menynr4 = menynr.substr(0,4)+''+(parseInt(antall_elementer)-1);		
			if(document.getElementById(menynr4)){
				document.getElementById(menynr4).style.visibility='hidden';
			}
		}
		else{
			menynr1 = menynr.substr(0,4)+''+(parseInt(t)-1);
			if(document.getElementById(menynr1)){
				document.getElementById(menynr1).style.visibility='hidden';
			}
			menynr2 = menynr.substr(0,4)+''+(parseInt(t)+1);
			if(document.getElementById(menynr2)){
				document.getElementById(menynr2).style.visibility='hidden';
			}
		}
	}
	else if(menynr.substring(4,5)=='_'){
		var t = menynr.slice(5);
		if(t=='1'){
			menynr3 = menynr.substr(0,5)+'2';
			if(document.getElementById(menynr3)){
				document.getElementById(menynr3).style.visibility='hidden';
			}
		}
		else if(t==antall_elementer){			
			menynr4 = menynr.substr(0,5)+''+(parseInt(antall_elementer)-1);		
			if(document.getElementById(menynr4)){
				document.getElementById(menynr4).style.visibility='hidden';
			}
		}
		else{
			menynr1 = menynr.substr(0,5)+''+(parseInt(t)-1);
			if(document.getElementById(menynr1)){
				document.getElementById(menynr1).style.visibility='hidden';
			}
			menynr2 = menynr.substr(0,5)+''+(parseInt(t)+1);
			if(document.getElementById(menynr2)){
				document.getElementById(menynr2).style.visibility='hidden';
			}
		}	
	}
}

function vent_og_fjern(layere){
	if(nivaaet1=='no' && nivaaet2=='no' && nivaaet3=='no'){ 
		var i=0;
		for(i=0;i<layere.length;i++){  		
			document.getElementById(layere[i]).style.visibility='hidden';
		}
	}	
}