function showOverNav(butName){
//alert(butName);
	var navButton = document.images[navOverArray[butName][1]];
	//alert(navButton.src);
	//alert(navOverArray[butName][0].src);
	navButton.src = navOverArray[butName][0].src;
}
function hideOverNav(butName){
	var navButton = document.images[navOffArray[butName][1]];
	navButton.src = navOffArray[butName][0].src;
}
var navOverArray = new Array(14);
for (var i=0;i<14;i++) {
	navOverArray[i] = new Array(2);
}
var navOffArray = new Array(14);
for (var i=0;i<14;i++) {
	navOffArray[i] = new Array(2);
}

var leftNavNew = 0;
var leftNavGen = 1;
var leftNavHis = 2;
var leftNavThr = 3;
var leftNavCon = 4;
var leftNavFan = 5;
var leftNavEbo = 6;
var navNew = 7;
var navGen = 8;
var navHis = 9;
var navThr = 10;
var navCon = 11;
var navFan = 12;
var leftNavBlack = 13;

// preload work
navOverArray[leftNavNew][0] = new Image();
navOverArray[leftNavNew][0].src = path+"images/nav/leftNavNew_over.gif";
navOverArray[leftNavNew][1] = "leftNav1";

navOffArray[leftNavNew][0] = new Image();
navOffArray[leftNavNew][0].src = path+"images/nav/leftNavNew.gif";
navOffArray[leftNavNew][1] = "leftNav1";

navOverArray[leftNavGen][0] = new Image();
navOverArray[leftNavGen][0].src = path+"images/nav/leftNavGeneral_over.gif";
navOverArray[leftNavGen][1] = "leftNav2";

navOffArray[leftNavGen][0] = new Image();
navOffArray[leftNavGen][0].src = path+"images/nav/leftNavGeneral.gif";
navOffArray[leftNavGen][1] = "leftNav2";

navOverArray[leftNavHis][0] = new Image();
navOverArray[leftNavHis][0].src = path+"images/nav/leftNavHistorical_over.gif";
navOverArray[leftNavHis][1] = "leftNav3";

navOffArray[leftNavHis][0] = new Image();
navOffArray[leftNavHis][0].src = path+"images/nav/leftNavHistorical.gif";
navOffArray[leftNavHis][1] = "leftNav3";

navOverArray[leftNavThr][0] = new Image();
navOverArray[leftNavThr][0].src = path+"images/nav/leftNavThrillers_over.gif";
navOverArray[leftNavThr][1] = "leftNav4";

navOffArray[leftNavThr][0] = new Image();
navOffArray[leftNavThr][0].src = path+"images/nav/leftNavThrillers.gif";
navOffArray[leftNavThr][1] = "leftNav4";

navOverArray[leftNavCon][0] = new Image();
navOverArray[leftNavCon][0].src = path+"images/nav/leftNavContemp_over.gif";
navOverArray[leftNavCon][1] = "leftNav5";

navOffArray[leftNavCon][0] = new Image();
navOffArray[leftNavCon][0].src = path+"images/nav/leftNavContemp.gif";
navOffArray[leftNavCon][1] = "leftNav5";

navOverArray[leftNavFan][0] = new Image();
navOverArray[leftNavFan][0].src = path+"images/nav/leftNavFantasy_over.gif";
navOverArray[leftNavFan][1] = "leftNav6";

navOffArray[leftNavFan][0] = new Image();
navOffArray[leftNavFan][0].src = path+"images/nav/leftNavFantasy.gif";
navOffArray[leftNavFan][1] = "leftNav6";

navOverArray[leftNavEbo][0] = new Image();
navOverArray[leftNavEbo][0].src = path+"images/nav/leftNavEbooks_over.gif";
navOverArray[leftNavEbo][1] = "leftNav7";

navOffArray[leftNavEbo][0] = new Image();
navOffArray[leftNavEbo][0].src = path+"images/nav/leftNavEbooks.gif";
navOffArray[leftNavEbo][1] = "leftNav7";

navOverArray[navNew][0] = new Image();
navOverArray[navNew][0].src = path+"images/nav/menuNew_over.gif";
navOverArray[navNew][1] = "nav1";

navOffArray[navNew][0] = new Image();
navOffArray[navNew][0].src = path+"images/nav/menuNew.gif";
navOffArray[navNew][1] = "nav1";

navOverArray[navGen][0] = new Image();
navOverArray[navGen][0].src = path+"images/nav/menuGeneral_over.gif";
navOverArray[navGen][1] = "nav2";

navOffArray[navGen][0] = new Image();
navOffArray[navGen][0].src = path+"images/nav/menuGeneral.gif";
navOffArray[navGen][1] = "nav2";

navOverArray[navHis][0] = new Image();
navOverArray[navHis][0].src = path+"images/nav/menuHistorical_over.gif";
navOverArray[navHis][1] = "nav3";

navOffArray[navHis][0] = new Image();
navOffArray[navHis][0].src = path+"images/nav/menuHistorical.gif";
navOffArray[navHis][1] = "nav3";

navOverArray[navThr][0] = new Image();
navOverArray[navThr][0].src = path+"images/nav/menuThrillers_over.gif";
navOverArray[navThr][1] = "nav4";

navOffArray[navThr][0] = new Image();
navOffArray[navThr][0].src = path+"images/nav/menuThrillers.gif";
navOffArray[navThr][1] = "nav4";

navOverArray[navCon][0] = new Image();
navOverArray[navCon][0].src = path+"images/nav/menuContemp_over.gif";
navOverArray[navCon][1] = "nav5";

navOffArray[navCon][0] = new Image();
navOffArray[navCon][0].src = path+"images/nav/menuContemp.gif";
navOffArray[navCon][1] = "nav5";

navOverArray[navFan][0] = new Image();
navOverArray[navFan][0].src = path+"images/nav/menuFantasy_over.gif";
navOverArray[navFan][1] = "nav6";

navOffArray[navFan][0] = new Image();
navOffArray[navFan][0].src = path+"images/nav/menuFantasy.gif";
navOffArray[navFan][1] = "nav6"

navOverArray[leftNavBlack][0] = new Image();
navOverArray[leftNavBlack][0].src = path+"images/nav/leftNavBlackStar_over.gif";
navOverArray[leftNavBlack][1] = "leftNav8";

navOffArray[leftNavBlack][0] = new Image();
navOffArray[leftNavBlack][0].src = path+"images/nav/leftNavBlackStar.gif";
navOffArray[leftNavBlack][1] = "leftNav8"