<!-- Hide script from old browsers
		function turn_on(menuitem){
			document.images[menuitem].src='./images/' + menuitem + '_on.gif'; 
		};
		function turn_off(menuitem){
			document.images[menuitem].src='./images/' + menuitem + '_off.gif';		
		};
		
	
		<!-- Preload the top navigation images -->		
		<!-- for the rollover -->		
		function preload(){
			document.top_client.src='./images/btn_schedule_off.gif';
			document.top_client.src='./images/btn_schedule_on.gif';
			
			document.top_menu.src='./images/btn_events_off.gif';
			document.top_menu.src='./images/btn_events_on.gif';
			
			document.top_client.src='./images/btn_sponsors_off.gif';
			document.top_client.src='./images/btn_sponsors_on.gif';
			
			document.top_menu.src='./images/btn_register_off.gif';
			document.top_menu.src='./images/btn_register_on.gif';
			
			document.top_menu.src='./images/btn_contact_off.gif';
			document.top_menu.src='./images/btn_contact_on.gif';
			
			document.top_menu.src='./images/btn_africa_off.gif';
			document.top_menu.src='./images/btn_africa_on.gif';
			
			document.top_menu.src='./images/btn_asia_off.gif';
			document.top_menu.src='./images/btn_asia_on.gif';
			
			document.top_menu.src='./images/btn_europe_off.gif';
			document.top_menu.src='./images/btn_europe_on.gif';
			
			document.top_menu.src='./images/btn_india_off.gif';
			document.top_menu.src='./images/btn_india_on.gif';
			
			document.top_menu.src='./images/btn_la_off.gif';
			document.top_menu.src='./images/btn_la_on.gif';
			
			
		};

       
        // End hiding script from old browsers -->