// JavaScript Document
var mainRevert = new Array();
var subRevert = new Array();

// Preload
if (document.images) {
  var mainFlipped = new Array();
  var subFlipped = new Array();

  for(i=1; i<=5; i++) {
    mainFlipped[i] = new Image();
    mainFlipped[i].src = "img/nav_main_on_0"+i+".jpg";
  }
  
  for(i=1; i<=5; i++) {
    subFlipped[i] = new Image();
    subFlipped[i].src = "img/nav_sub_on_0"+i+".jpg";
  }
}

function mainOver(num) {
  if(document.images) {
    mainRevert[num] = document.images["mainnav"+num].src;
    document.images["mainnav"+num].src = mainFlipped[num].src;
  }
}
function mainOut(num) {
  if(document.images) document.images["mainnav"+num].src = mainRevert[num];
}

function subOver(num) {
  if(document.images) {
    subRevert[num] = document.images["subnav"+num].src;
    document.images["subnav"+num].src = subFlipped[num].src;
  }
}
function subOut(num) {
  if(document.images) document.images["subnav"+num].src = subRevert[num];
}