var imageFiles_19_31 = new Array();
imageFiles_19_31['0'] = new Array ('_images/19_Clean_up.gif', '_images/19_Clean_upMouseover.gif');

function image_on_19_31 (position) {
   var doc = eval("document.image19_31" + position);
   doc.src = imageFiles_19_31[position][1];
}

function image_off_19_31 (position) {
   var doc = eval("document.image19_31" + position);
   doc.src = imageFiles_19_31[position][0];
}