var imageFiles_21_10 = new Array();
imageFiles_21_10['0'] = new Array ('_images/21_Rental_Properties.gif', '_images/21_Rental_PropertiesMouseover.gif');
imageFiles_21_10['1'] = new Array ('_images/21_Strength_Links.gif', '_images/21_Strength_LinksMouseover.gif');
imageFiles_21_10['2'] = new Array ('_images/21_Strength_Items.gif', '_images/21_Strength_ItemsMouseover.gif');

function image_on_21_10 (position) {
   var doc = eval("document.image21_10" + position);
   doc.src = imageFiles_21_10[position][1];
}

function image_off_21_10 (position) {
   var doc = eval("document.image21_10" + position);
   doc.src = imageFiles_21_10[position][0];
}