var strPageRoot = "";

var imgHomeOn = new Image();
var imgHomeOff = new Image();
var imgAboutOn = new Image();
var imgAboutOff = new Image();
var imgAboutBookOn = new Image();
var imgAboutBookOff = new Image();
var imgNewsOn = new Image();
var imgNewsOff = new Image();
var imgContestOn = new Image();
var imgContestOff = new Image();
var imgBuyOn = new Image();
var imgBuyOff = new Image();
var imgEmailOn = new Image();
var imgEmailOff = new Image();

imgHomeOn.src = strPageRoot + "img/nav_home_on.gif";
imgHomeOff.src = strPageRoot + "img/nav_home.gif";
imgAboutOn.src = strPageRoot + "img/nav_about_on.gif";
imgAboutOff.src = strPageRoot + "img/nav_about.gif";
imgAboutBookOn.src = strPageRoot + "img/nav_about_book_on.gif";
imgAboutBookOff.src = strPageRoot + "img/nav_about_book.gif";
imgNewsOn.src = strPageRoot + "img/nav_news_on.gif";
imgNewsOff.src = strPageRoot + "img/nav_news.gif";
imgContestOn.src = strPageRoot + "img/nav_contest_on.gif";
imgContestOff.src = strPageRoot + "img/nav_contest.gif";
imgBuyOn.src = strPageRoot + "img/h_buy_book_on.gif";
imgBuyOff.src = strPageRoot + "img/h_buy_book.gif";
imgEmailOn.src = strPageRoot + "img/h_email_on.gif";
imgEmailOff.src = strPageRoot + "img/h_email.gif";

function fToggleDiv(strDiv) { 
 var objDiv = document.getElementById(strDiv); 
 if(objDiv.style.visibility == "hidden") { 
	 objDiv.style.visibility = "visible"; 
	 objDiv.style.display = "block"; 	 
 } else { 
	 objDiv.style.visibility = "hidden"; 
	 objDiv.style.display = "none"; 	 
 } 
}