if (document.images) {
			img6on = new Image();          
            img6on.src = "/img/btn_video_on.gif"; 
			img6off = new Image();          
            img6off.src = "/img/btn_video_off.gif";
			img7on = new Image();          
            img7on.src = "/img/btn_read_on.gif"; 
			img7off = new Image();          
            img7off.src = "/img/btn_read_off.gif";	
			img8on = new Image();          
            img8on.src = "/img/btn_listen_on.gif"; 
			img8off = new Image();          
            img8off.src = "/img/btn_listen_off.gif";
			img9on = new Image();          
            img9on.src = "/img/btn_download_on.gif"; 
			img9off = new Image();          
            img9off.src = "/img/btn_download_off.gif";
			img10on = new Image();          
            img10on.src = "/img/btn_podcast_on.gif"; 
			img10off = new Image();          
            img10off.src = "/img/btn_podcast_off.gif";
        }