var total_number_of_side_link_images = 8;

var total_number_of_top_link_images = 4;


var original_side_images = new Array(total_number_of_side_link_images);
var original_top_images = new Array(total_number_of_top_link_images);
var preloaded_side_images = new Array(total_number_of_side_link_images);
var preloaded_top_images = new Array(total_number_of_top_link_images);
for(var i=1; i<=total_number_of_side_link_images; i++)
{
  preloaded_side_images[i] = new Image;
  preloaded_side_images[i].src = "images/nav/nav_side/over/"+i+".jpg";
  original_side_images[i] = new Image;
  original_side_images[i].src = "images/nav/nav_side/up/"+i+".jpg";
}
for(var i=1; i<=total_number_of_top_link_images; i++)
{
  preloaded_top_images[i] = new Image;
  preloaded_top_images[i].src = "images/nav/nav_top/over/"+i+".jpg";
  original_top_images[i] = new Image;
  original_top_images[i].src = "images/nav/nav_top/up/"+i+".jpg";
}

function rollOver(rolled_link, position) {
	document.getElementById(position+"_"+rolled_link).src = eval("preloaded_"+position+"_images")[rolled_link].src;
}

function rollOut(rolled_link, position) {
	document.getElementById(position+"_"+rolled_link).src = eval("original_"+position+"_images")[rolled_link].src;
}