// inactive images navigation
	img0off = new Image();
	img0off.src = "pics/nv/nv_00_i.gif"; 
	
	img1off = new Image();
	img1off.src = "pics/nv/nv_01_i.gif"; 

	img2off = new Image();
	img2off.src = "pics/nv/nv_02_i.gif"; 

	img3off = new Image();
	img3off.src = "pics/nv/nv_03_i.gif"; 

	img4off = new Image();
	img4off.src = "pics/nv/nv_04_i.gif"; 
	
	img5off = new Image();
	img5off.src = "pics/nv/nv_05_i.gif"; 
	
	img6off = new Image();
	img6off.src = "pics/nv/nv_06_i.gif";
	
	

	// active images navigation
	img0on = new Image();
	img0on.src =  "pics/nv/nv_00_a.gif"; 
	
	img1on = new Image();
	img1on.src =  "pics/nv/nv_01_a.gif"; 

	img2on = new Image();
	img2on.src =  "pics/nv/nv_02_a.gif"; 

	img3on = new Image();
	img3on.src =  "pics/nv/nv_03_a.gif"; 

	img4on = new Image();
	img4on.src =  "pics/nv/nv_04_a.gif"; 
	
	img5on = new Image();
	img5on.src =  "pics/nv/nv_05_a.gif"; 
	
	img6on = new Image();
	img6on.src =  "pics/nv/nv_06_a.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");
        }
}