var imageFiles_5a7sn_4 = new Array();
imageFiles_5a7sn_4['0'] = new Array ('_images/5a7sn_Dusty_Roads.gif', '_images/5a7sn_Dusty_RoadsMouseover.gif');

function image_on_5a7sn_4 (position) {
   var doc = eval("document.image5a7sn_4" + position);
   doc.src = imageFiles_5a7sn_4[position][1];
}

function image_off_5a7sn_4 (position) {
   var doc = eval("document.image5a7sn_4" + position);
   doc.src = imageFiles_5a7sn_4[position][0];
}