link_array = new Array (
'./categories/warehouse.html',
'./categories/shop.html',
'./categories/office.html',
'./categories/land.html',
'./categories/house.html',
'./categories/flat.html',
'./categories/farm.html'
);

image_array = new Array (
'./media/warehouse/warehouse.jpg',
'./media/shop/shop.jpg',
'./media/office/office.jpg',
'./media/land/land.jpg',
'./media/house/house.jpg',
'./media/flat/flat.jpg',
'./media/farm/farm.jpg'
);