bo1 = new Image
bo2 = new Image
bo3 = new Image
bo4 = new Image
bo5 = new Image
bo6 = new Image
bo7 = new Image
bo8 = new Image
bo9 = new Image
bo10 = new Image
bo11 = new Image

oo1 = new Image
oo2 = new Image
oo3 = new Image
oo4 = new Image
oo5 = new Image
oo6 = new Image
oo7 = new Image
oo8 = new Image
oo9 = new Image
oo10 = new Image
oo11 = new Image

bo1.src = 'images/mb1.gif'
bo2.src = 'images/mb2.gif'
bo3.src = 'images/mb3.gif'
bo4.src = 'images/mb4.gif'
bo5.src = 'images/mb5.gif'
bo6.src = 'images/mb6.gif'
bo7.src = 'images/mb7.gif'
bo8.src = 'images/mb8.gif'
bo9.src = 'images/mb9.gif'
bo10.src = 'images/mb10.gif'
bo11.src = 'images/mb11.gif'

oo1.src = 'images/mb1_ov.gif'
oo2.src = 'images/mb2_ov.gif'
oo3.src = 'images/mb3_ov.gif'
oo4.src = 'images/mb4_ov.gif'
oo5.src = 'images/mb5_ov.gif'
oo6.src = 'images/mb6_ov.gif'
oo7.src = 'images/mb7_ov.gif'
oo8.src = 'images/mb8_ov.gif'
oo9.src = 'images/mb9_ov.gif'
oo10.src = 'images/mb10_ov.gif'
oo11.src = 'images/mb11_ov.gif'