window.onload=function(){vertCenter();}
		window.onresize=function(){vertCenter();}
		
		function vertCenter(){
		var MT = document.getElementById('container').style.marginTop;
		
		if(window.innerHeight){
		var elemHei = window.innerHeight;
		
		}else if(document.documentElement.clientHeight > 0){
		var elemHei = document.documentElement.clientHeight;
		}else{
		var elemHei = document.body.clientHeight;
		}
		
		
		var elemMargin = (elemHei - 600) /2
		if(elemMargin <= 0){elemMargin = 0;}
		document.getElementById('container').style.marginTop = elemMargin + 'px';
		
		//initialize the nav
		initNav();
		}
		
		
		function initNav(){
		
			//init the main nav
			if(document.getElementById('main_nav')){
			
			var a;
			var ul = document.getElementById('main_nav');
			var lis = ul.getElementsByTagName('img');
			
			for(i=0; i<lis.length; i++){
				a = lis[i];
				
					a.onmouseover = function(){togglenav(this.id, 1);}
					a.onmouseout  = function(){togglenav(this.id, 0);}
				
			}
			
			}
			
			//init the level 2 nav
			if(document.getElementById('level2_nav')){
			
			var a;
			var ul = document.getElementById('level2_nav');
			var lis = ul.getElementsByTagName('li');

			/******************************************************************/			
			//set the active level 2 nav
			var curPage = window.location.search.toString();
			var pagenameStart = curPage.indexOf('page=');
			var pagename = curPage.substring(pagenameStart+5, curPage.length);
			//check for additional params
			if(pagename.indexOf('&') > 0){
				var nextQ = pagename.indexOf('&');
				pagename = pagename.substring(0, nextQ);
			}
			/******************************************************************/
			
			for(i=0; i<lis.length; i++){
				a = lis[i];
					if(a.title == pagename){a.className = 'l2act';}else{
					a.onmouseover = function(){ this.style.backgroundColor = '#e5e5e5';}
					a.onmouseout  = function(){ this.style.backgroundColor = '#d2d6d9';}
					}
			}
			
			
			
			
			}
			
			
		}
		
		function togglenav(elem, state){
			var cur = document.getElementById(elem).src;
			
			if(document.getElementById(elem).className != 'active'){
			
				if(state == 1){
				document.getElementById(elem).src = 'im/nav/'+elem+'_act.gif';
				}else{
				document.getElementById(elem).src = 'im/nav/'+elem+'.gif';
				}
			}
			
		}
		
		
		function changeHero(imgsrc){
			var srcstr = "im/hero_images/"+ imgsrc +".jpg";
			document.getElementById('int_hero_image').src = srcstr;
		}