var imageFiles_pd_4 = new Array();
imageFiles_pd_4['0'] = new Array ('_images/pd_GLASS.gif', '_images/pd_GLASSMouseover.gif');

function image_on_pd_4 (position) {
   var doc = eval("document.imagepd_4" + position);
   doc.src = imageFiles_pd_4[position][1];
}

function image_off_pd_4 (position) {
   var doc = eval("document.imagepd_4" + position);
   doc.src = imageFiles_pd_4[position][0];
}