var imageFiles_iy_1 = new Array();
imageFiles_iy_1['0'] = new Array ('_images/iy_North_West_Team_Roper.gif', '_images/iy_North_West_Team_RoperMouseover.gif');

function image_on_iy_1 (position) {
   var doc = eval("document.imageiy_1" + position);
   doc.src = imageFiles_iy_1[position][1];
}

function image_off_iy_1 (position) {
   var doc = eval("document.imageiy_1" + position);
   doc.src = imageFiles_iy_1[position][0];
}