if (document.images) {
res1 = new Image
res1on = new Image
res2 = new Image
res2on = new Image
res3 = new Image
res3on = new Image
res4 = new Image
res4on = new Image
res5 = new Image
res5on = new Image
res6 = new Image
res6on = new Image
res7 = new Image
res7on = new Image
res8 = new Image
res8on = new Image
res9 = new Image
res9on = new Image

res1.src = "residential/spo.jpg"
res1on.src = "residential/spo-on.jpg"
res2.src = "residential/mgd.jpg"
res2on.src = "residential/mgd-on.jpg"
res3.src = "residential/mbs.jpg"
res3on.src = "residential/mbs-on.jpg"
res4.src = "residential/bde.jpg"
res4on.src = "residential/bde-on.jpg" 
res5.src = "residential/oli.jpg"
res5on.src = "residential/oli-on.jpg" 
res6.src = "residential/oen.jpg"
res6on.src = "residential/oen-on.jpg" 
res7.src = "residential/ufg.jpg"
res7on.src = "residential/ufg-on.jpg" 
res8.src = "residential/oro.jpg"
res8on.src = "residential/oro-on.jpg" 
res9.src = "residential/dde.jpg"
res9on.src = "residential/dde-on.jpg"
}