function setImage(image) {
  $("default_image").hide()
  $("default_image").src = image
  setTimeout("appImg()", 800);
}

function appImg() {
  new Effect.Appear("default_image", {duration:0.3})
}

function setText(text) {
  $("product-text").hide()
  $("product-text").innerHTML = text;
  new Effect.Appear("product-text")
}