printview = false
preloaded = false
bcurrent = ""

function init(b,lev)
{
	dopreload(lev)
	
	bcurrent = 'b' + b
	btn = document.getElementById('b' + b)
	if(btn)btn.src = eval('b' + b + 'on.src')
	
	
	lnav = document.getElementById('leftnav')
	var cmd = 'lnav.style.backgroundImage = "url(../images/' + b + '-left.jpg)"'
	if(lnav)eval(cmd)
	lst = document.getElementById('lst_' + b)
	if(lst)lst.style.backgroundImage = "url(../images/aspartame-arrow-on.gif)"
	sub = document.getElementById('sub_' + b)
	if(sub)
	{
		sub.style.display = 'block'
		sub.style.backgroundImage = "url()"
	}
}


function dopreload(lev)
{
	preload('bhomeoff',lev+'images/btn_home.jpg')
	preload('bhomeon',lev+'images/btn_home_on.jpg')
	preload('bfactsoff',lev+'images/btn_facts.jpg')
	preload('bfactson',lev+'images/btn_facts_on.jpg')
	preload('bblogoff',lev+'images/btn_blog.jpg')
	preload('bblogon',lev+'images/btn_blog_on.jpg')
	preload('bnewsoff',lev+'images/btn_news.jpg')
	preload('bnewson',lev+'images/btn_news_on.jpg')
	preload('bresoff',lev+'images/btn_research.jpg')
	preload('breson',lev+'images/btn_research_on.jpg')
	preload('btoolsoff',lev+'images/btn_tools.jpg')
	preload('btoolson',lev+'images/btn_tools_on.jpg')
	preload('bmoviesoff',lev+'images/btn_movies.jpg')
	preload('bmovieson',lev+'images/btn_movies_on.jpg')
	preload('blinksoff',lev+'images/btn_links.jpg')
	preload('blinkson',lev+'images/btn_links_on.jpg')


	preloaded = true
}

function preload(imgObj,imgSrc) {
	if (document.images) {
		eval(imgObj+' = new Image()')
		eval(imgObj+'.src = "'+imgSrc+'"')
	}
}


function swapImage(name){
	if(!preloaded) return
	if(bcurrent == name) return
	b = document.getElementById(name)
	if(!b) return
	bsrc = b.src
	bonsrc = eval(name + 'on.src')
	if(bsrc == bonsrc)
	{
		b.src = eval(name + 'off.src')
	}
	else
	{
		b.src = eval(name + 'on.src')
	}
}

function setPg(){
	var pgwd=document.body.offsetWidth
	var figure = (pgwd - 823) / 2 
	document.getElementById('leftNavLong').style.left = figure;
}

/*functions for dropdown showing and rollover*/
function changeIt(style1){
	document.getElementById(style1).className="navOver";
}

function changeBack(style1){
	document.getElementById(style1).className="navSecond";
}

function showIt(style2){
	var pgwd = document.body.offsetWidth
	if(style2 == 'factsll'){
		var figure=(pgwd - 823)/2 + 347
	}
	else{
		var figure=(pgwd - 823)/2 + 412
	}
	document.getElementById(style2).style.left=figure;
	document.getElementById(style2).style.visibility = "visible";
}

function showBack(style2){
	document.getElementById(style2).style.visibility="hidden";
}

/*functions for left nav rollover*/
function rollover(arrowimage, linktext){
	var newImage = "../images/aspartame-arrow-on.gif";                
	document.getElementById(arrowimage).src= newImage;	
	document.getElementById(linktext).className="leftnavTitleOn";
}
function rollout(arrowimage, linktext){
	var newImage = "../images/aspartame-arrow-off.gif";                
	document.getElementById(arrowimage).src= newImage;		
	document.getElementById(linktext).className="leftnavTitleOff";
}