var imageFiles_n9_1 = new Array();
imageFiles_n9_1['0'] = new Array ('_images/n9_Drivetrain.gif', '_images/n9_DrivetrainMouseover.gif');

function image_on_n9_1 (position) {
   var doc = eval("document.imagen9_1" + position);
   doc.src = imageFiles_n9_1[position][1];
}

function image_off_n9_1 (position) {
   var doc = eval("document.imagen9_1" + position);
   doc.src = imageFiles_n9_1[position][0];
}