<!-- 
if (document.images) {
media_img1on=new Image();
media_img1on.src="images/nav_media/btn1on.gif";
media_img2on=new Image();
media_img2on.src="images/nav_media/btn2on.gif";

media_img1off=new Image();
media_img1off.src="images/nav_media/btn1off.gif";
media_img2off=new Image();
media_img2off.src="images/nav_media/btn2off.gif";

}
function media_imgon(media_imgName) { if (document.images) { document[media_imgName].src = eval(media_imgName + "on.src"); } }
function media_imgoff(media_imgName) { if (document.images) { document[media_imgName].src = eval(media_imgName + "off.src"); } }
// -->