function bullet_hover(name) { 
		var obj;
		if(obj=document.getElementById("bullet_" + name)) { 
			if(obj.src.indexOf('nav_on') < 0) { 
				if(obj.src.indexOf('nav_off') < 0) { obj.src="images/nav_off.gif"; }
				else { obj.src="images/nav_hover.gif"; }
			}
		}
	}
	
	function set_nav_section() {
		var obj;
		if(obj=document.getElementById("bullet_" + page_name)) { 
			obj.src="images/nav_on.gif";
		}
	}