var imageFiles_17v_21 = new Array();
imageFiles_17v_21['0'] = new Array ('_images/17v___.gif', '_images/17v___Mouseover.gif');

function image_on_17v_21 (position) {
   var doc = eval("document.image17v_21" + position);
   doc.src = imageFiles_17v_21[position][1];
}

function image_off_17v_21 (position) {
   var doc = eval("document.image17v_21" + position);
   doc.src = imageFiles_17v_21[position][0];
}