if (document.images) {
    topnav_shop_off = new Image(); topnav_shop_off.src = "../images/phplist/topnav_shop.gif";
	topnav_cyo_off = new Image(); topnav_cyo_off.src = "../images/phplist/topnav_cyo.gif";
    topnav_events_off = new Image(); topnav_events_off.src = "../images/phplist/topnav_events.gif";
    topnav_press_off = new Image(); topnav_press_off.src = "../images/phplist/topnav_press.gif";
    topnav_links_off = new Image(); topnav_links_off.src = "../images/phplist/topnav_links.gif";   
    topnav_info_off = new Image(); topnav_info_off.src = "../images/phplist/topnav_info.gif";   
     
    topnav_shop_on = new Image(); topnav_shop_on.src = "../images/phplist/topnav_shop_on.gif";
	topnav_cyo_on = new Image(); topnav_cyo_on.src = "../images/phplist/topnav_cyo_on.gif";
    topnav_events_on = new Image(); topnav_events_on.src = "../images/phplist/topnav_events_on.gif";
	topnav_press_on = new Image(); topnav_press_on.src = "../images/phplist/topnav_press_on.gif";
    topnav_links_on = new Image(); topnav_links_on.src = "../images/phplist/topnav_links_on.gif";  
    topnav_info_on = new Image(); topnav_info_on.src = "../images/phplist/topnav_info_on.gif";   
    }
    
function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "_on.src"); 
						}
}

function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "_off.src"); 
						      
				}
}