//this highlights the topnav link, which is set in the body tag
var currentpage = "none";
	
	function setPage(pagename){
		if (document.images[currentpage]){
			document.images[currentpage].src = eval(currentpage).src;
		}
			if (pagename != 'none' && document.images[pagename]){
				document.images[pagename].src = eval(pagename+"on").src;
			}
			currentpage = pagename;
		}
		
//this preloads all the images
if (document.images) {
		
		//topnav
		nav_home_on= new Image;
     	nav_home_on.src="images/nav_home_on.gif";  
     	nav_home= new Image;
     	nav_home.src="images/nav_home.gif";
		
		nav_about_on= new Image;
     	nav_about_on.src="images/nav_about_on.gif";  
     	nav_about= new Image;
     	nav_about.src="images/nav_about.gif";
		
		nav_candidates_on= new Image;
     	nav_candidates_on.src="images/nav_candidates_on.gif";  
     	nav_candidates= new Image;
     	nav_candidates.src="images/nav_candidates.gif";
		
		nav_clients_on= new Image;
     	nav_clients_on.src="images/nav_clients_on.gif";  
     	nav_clients= new Image;
     	nav_clients.src="images/nav_clients.gif";
		
		nav_contact_on= new Image;
     	nav_contact_on.src="images/nav_contact_on.gif";  
     	nav_contact= new Image;
     	nav_contact.src="images/nav_contact.gif";
		
		//leftnav
		ltnav_arrow_on= new Image;
     	ltnav_arrow_on.src="images/ltnav_arrow_on.gif";  
     	ltnav_arrow= new Image;
     	ltnav_arrow.src="images/ltnav_arrow.gif";
  }
  
 //rollover function for single images
 function rollImage(imagename,imageloc){
		if (currentpage != imageloc){
			document.images[imageloc].src = imagename.src;
		}
	}