var imageFiles_r8_1 = new Array();
imageFiles_r8_1['0'] = new Array ('_images/r8_.gif', '_images/r8_Mouseover.gif');

function image_on_r8_1 (position) {
   var doc = eval("document.imager8_1" + position);
   doc.src = imageFiles_r8_1[position][1];
}

function image_off_r8_1 (position) {
   var doc = eval("document.imager8_1" + position);
   doc.src = imageFiles_r8_1[position][0];
}