if (document.layers)  {
     ns = 1; ie = 0; 
} else {
     ns = 0; ie = 1;
     }
function zeigen(name) {
if (ns) {
    document.layers[''+name].visibility = "show";		
    }
    else {
    document.all[''+name].style.visibility = "visible"
    }
 }
function verbergen(name) {
if (ns){
    document.layers[''+name].visibility = "hide"
    }
    else {
    document.all[''+name].style.visibility = "hidden"
    }
}


function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}
function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
		//alert(document[changeImages.arguments[i]].src +' =\n '+ changeImages.arguments[i+1].src);
		document[changeImages.arguments[i]].src = changeImages.arguments[i+1].src;
		}
	}
	
}
var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		home_0 = newImage("../../img/nav/home.gif"); 
 		home_1 = newImage("../../img/nav/home_o.gif");
		
		port_0 = newImage("../../img/nav/port.gif"); 
 		port_1 = newImage("../../img/nav/port_o.gif");

		hers_0 = newImage("../../img/nav/hers.gif"); 
 		hers_1 = newImage("../../img/nav/hers_o.gif");
			
		kont_0 = newImage("../../img/nav/kont.gif"); 
 		kont_1 = newImage("../../img/nav/kont_o.gif");
						
		links_0 = newImage("../../img/nav/links.gif"); 
 		links_1 = newImage("../../img/nav/links_o.gif");
						
		down_0 = newImage("../../img/nav/down.gif"); 
 		down_1 = newImage("../../img/nav/down_o.gif");
				
		deut_0 = newImage("../../img/nav/deut.gif"); 
 		deut_1 = newImage("../../img/nav/deut_o.gif"); 

		engl_0 = newImage("../../img/nav/engl.gif"); 
 		engl_1 = newImage("../../img/nav/engl_o.gif"); 
		
		esp_0 = newImage("../../img/nav/esp.gif"); 
 		esp_1 = newImage("../../img/nav/esp_o.gif"); 	
		
				
		mars_0 = newImage("../../img/nav/mars.gif"); 
 		mars_1 = newImage("../../img/nav/mars_o.gif"); 	
					
		
		preloadFlag = true;
	}
}