if (document.images) {
		//MENU IMAGES
        img1on = new Image();		
	img1on.src = "images/map_north.gif";  
	img2on = new Image();		
	img2on.src = "images/map_south.gif";
	img3on = new Image(); 		
	img3on.src = "images/map_europe.gif";
	img4on = new Image();
	img4on.src = "images/map_africa.gif";
        img5on = new Image();		
	img5on.src = "images/map_asia.gif";  

	img1off = new Image(); 		
	img1off.src = "images/map.gif"; 
	img2off  = new Image();		
	img2off .src = "images/map.gif"; 
	img3off  = new Image(); 		
	img3off .src =  "images/map.gif"; 
	img4off  = new Image();
	img4off .src =  "images/map.gif"; 
        img5off  = new Image();		
	img5off .src =  "images/map.gif"; 
}

function imgOn(imgName) {
	if (document.images) {
	    document[imgName].src = eval(imgName + "on.src");
	}
}

function imgOff(imgName) {
	if (document.images) {
	    document[imgName].src = eval(imgName + "off.src");
	}
}


function swap_image(oriImage, nextImage) 
{
	if (document.images) 
	{
                eval("document." + oriImage + ".src='" + nextImage+ "'");
	}
}