var imageFiles_4f_16 = new Array();
imageFiles_4f_16['0'] = new Array ('_images/4f_Aquariums.gif', '_images/4f_AquariumsMouseover.gif');
imageFiles_4f_16['1'] = new Array ('_images/4f_Stands.gif', '_images/4f_StandsMouseover.gif');
imageFiles_4f_16['2'] = new Array ('_images/4f_Sumps.gif', '_images/4f_SumpsMouseover.gif');
imageFiles_4f_16['3'] = new Array ('_images/4f_Skimmers.gif', '_images/4f_SkimmersMouseover.gif');
imageFiles_4f_16['4'] = new Array ('_images/4f_Reactors.gif', '_images/4f_ReactorsMouseover.gif');
imageFiles_4f_16['5'] = new Array ('_images/4f_Wavemakers.gif', '_images/4f_WavemakersMouseover.gif');

function image_on_4f_16 (position) {
   var doc = eval("document.image4f_16" + position);
   doc.src = imageFiles_4f_16[position][1];
}

function image_off_4f_16 (position) {
   var doc = eval("document.image4f_16" + position);
   doc.src = imageFiles_4f_16[position][0];
}