var offImgArray = new Array()
var onImgArray = new Array()

offImgArray["foto1"] = new Image (158,158)
offImgArray["foto2"] = new Image (158,158)
offImgArray["foto3"] = new Image (158,158)
offImgArray["foto4"] = new Image (158,158)
offImgArray["foto5"] = new Image (158,158)
offImgArray["foto6"] = new Image (158,158)

onImgArray["foto1"] = new Image (158,158)
onImgArray["foto2"] = new Image (158,158)
onImgArray["foto3"] = new Image (158,158)
onImgArray["foto4"] = new Image (158,158)
onImgArray["foto5"] = new Image (158,158)
onImgArray["foto6"] = new Image (158,158)

offImgArray["foto1"].src = "fotos/Paletes_small.jpg"
offImgArray["foto2"].src = "fotos/Estilha_small.jpg"
offImgArray["foto3"].src = "fotos/Estufa_small.jpg"
offImgArray["foto4"].src = "fotos/Casca_small.jpg"
offImgArray["foto5"].src = "fotos/Serradura_saco_small.jpg"
offImgArray["foto6"].src = "fotos/Pinhal_small.jpg"

onImgArray["foto1"].src = "fotos/Paletes_small_shadow.jpg"
onImgArray["foto2"].src = "fotos/Estilha_small_shadow.jpg"
onImgArray["foto3"].src = "fotos/Estufa_small_shadow.jpg"
onImgArray["foto4"].src = "fotos/Casca_small_shadow.jpg"
onImgArray["foto5"].src = "fotos/Serradura_saco_small_shadow.jpg"
onImgArray["foto6"].src = "fotos/Pinhal_small_shadow.jpg"

function imageOn(imgName) {
if (document.images) {
document.images[imgName].src=onImgArray[imgName].src
}
}

function imageOff(imgName) {
if (document.images) {
document.images[imgName].src=offImgArray[imgName].src
}
}