var imageFiles_a_1 = new Array();
imageFiles_a_1['0'] = new Array ('_images/a_Gold.gif', '_images/a_GoldMouseover.gif');
imageFiles_a_1['1'] = new Array ('_images/a_Silver.gif', '_images/a_SilverMouseover.gif');
imageFiles_a_1['2'] = new Array ('_images/a_Platinum.gif', '_images/a_PlatinumMouseover.gif');
imageFiles_a_1['3'] = new Array ('_images/a_Palladium.gif', '_images/a_PalladiumMouseover.gif');

function image_on_a_1 (position) {
   var doc = eval("document.imagea_1" + position);
   doc.src = imageFiles_a_1[position][1];
}

function image_off_a_1 (position) {
   var doc = eval("document.imagea_1" + position);
   doc.src = imageFiles_a_1[position][0];
}