var num = 0;
pics = new Array();

function load(name, first, sec) {  
  if (browserOK) {     
    pics[num] = new Array(3);
    pics[num][0] = new Image();
    pics[num][0].src = first;
    pics[num][1] = new Image();
    pics[num][1].src = sec;
    pics[num][2] = name;
    num++;
  }
}

function on(name){
  if (browserOK) {
     for (i = 0; i < num; i++) 
        if (name ==pics[i][2])  
          document.images[pics[i][2]].src = pics[i][1].src;
  }
}

function off(name){
  if (browserOK) {
     for (i = 0; i < num; i++) 
		if (name ==pics[i][2]) 
        document.images[pics[i][2]].src = pics[i][0].src;
  }
}

load("nav01", "images/nav/nav01-0.gif", "images/nav/nav01-1.gif");
load("nav02", "images/nav/nav02-0.gif", "images/nav/nav02-1.gif");
load("nav03", "images/nav/nav03-0.gif", "images/nav/nav03-1.gif");
load("nav04", "images/nav/nav04-0.gif", "images/nav/nav04-1.gif");
load("nav05", "images/nav/nav05-0.gif", "images/nav/nav05-1.gif");
load("nav06", "images/nav/nav06-0.gif", "images/nav/nav06-1.gif");
load("nav07", "images/nav/nav07-0.gif", "images/nav/nav07-1.gif");
load("nav08", "images/nav/nav08-0.gif", "images/nav/nav08-1.gif");

load("navSp02", "images/nav/navSp02-0.gif", "images/nav/navSp02-1.gif");