ns4 = (document.layers)? true:false
ie4 = (document.all)? true:false

//denne function placerer layerne så de altid retter sig efter browserstørrelsen
function moveLayers(){ 
	var gLayerX; 
    var gLayerY; 
    	if(document.layers){ 
            //reads coordinates 
            gLayerX = (Math.round(document.all ? document.body.clientWidth:window.innerWidth -770)/2); 
            gLayerY = (Math.round(document.all ? document.body.clientHeight:window.innerHeight-540)/2);
            //places the layers
			for (var i=1; i<= 4; i++){
			navn = "txt" + eval(i)
			    document.layers[navn].left = gLayerX + 620; //dette tal er til venstre
            	document.layers[navn].top = gLayerY + 265; //dette tal er toppen			            			 				
        	} 			
		}
        else if(document.all){ 
            //reads coordinates 
            gLayerX = (Math.round(document.all ? document.body.clientWidth:window.innerWidth -770)/2);  
            gLayerY = (Math.round(document.all ? document.body.clientHeight:window.innerHeight-540)/2);
          	//places the layers 
			for (var i=1; i<= 4; i++){
			navn = "txt" + eval(i)			    
				document.all[navn].style.left = gLayerX + 245; //venstre
    	        document.all[navn].style.top = gLayerY + 10; //toppen
			}
		}					 		
//		alert(gLayerX + ", " + gLayerY); 
} 

//function til at gemme layers
function hide(id){
	if (ns4) document.layers[id].visibility = "hide"
	else if (ie4) document.all[id].style.visibility = "hidden"	
}

//function til at viser layers
function show(id){
	if (ns4) document.layers[id].visibility = "show"
	else if (ie4) document.all[id].style.visibility = "visible"
}