var imageFiles_a_16 = new Array();
imageFiles_a_16['0'] = new Array ('_images/a_Gold.gif', '_images/a_GoldMouseover.gif');
imageFiles_a_16['1'] = new Array ('_images/a_Silver.gif', '_images/a_SilverMouseover.gif');
imageFiles_a_16['2'] = new Array ('_images/a_Platinum.gif', '_images/a_PlatinumMouseover.gif');
imageFiles_a_16['3'] = new Array ('_images/a_Palladium.gif', '_images/a_PalladiumMouseover.gif');

function image_on_a_16 (position) {
   var doc = eval("document.imagea_16" + position);
   doc.src = imageFiles_a_16[position][1];
}

function image_off_a_16 (position) {
   var doc = eval("document.imagea_16" + position);
   doc.src = imageFiles_a_16[position][0];
}