function init()  {
    makeFlash(bob)
    setInterval("fred.filters.alpha.opacity = (fred.filters.alpha.opacity + 5) % 101", 100)
    setInterval("foo(dave)", 100)
}
var delta = 5
function foo(obj)  {
    if ((obj.filters.alpha.opacity + delta > 100)
    ||  (obj.filters.alpha.opacity + delta < 0))
        delta = - delta
    obj.filters.alpha.opacity += delta
}
function makeFlash(obj)  {
    obj.flashTimer = setInterval("bob.filters.glow.enabled = !bob.filters.glow.enabled", 1000)
}
function stopFlash(obj)  {
    clearInterval(obj.flashTimer)
}