var baseopacity=20;

function slowhigh()
{
    which2=document.getElementById('imgVision');
    imgobj=which2;
    browserdetect=which2.filters? "ie" : typeof which2.style.MozOpacity=="string"? "mozilla" : ""
    instantset(baseopacity)
    highlighting=setInterval("gradualfade(imgobj)", 180)
}

function slowlow(which2)
{
    cleartimer()
    instantset(baseopacity)
}

function instantset(degree)
{
    if (browserdetect=="mozilla")
    imgobj.style.MozOpacity=degree/100
    else if (browserdetect=="ie")
    imgobj.filters.alpha.opacity=degree
}

function cleartimer()
{
    if (window.highlighting) clearInterval(highlighting)
}

function gradualfade(cur2)
{
    if (browserdetect=="mozilla" && cur2.style.MozOpacity<1)
    cur2.style.MozOpacity=Math.min(parseFloat(cur2.style.MozOpacity)+0.1, 0.99)
    else if (browserdetect=="ie" && cur2.filters.alpha.opacity<100)
    cur2.filters.alpha.opacity+=10
    else if (window.highlighting)
    clearInterval(highlighting)
}