var timer;

function ScrollDiv(dir)
{
    clearTimeout(timer); 
    var div = document.getElementById('SkinImage') 
    if(div.style.marginTop=='')
        y = 0;
    else 
        y = parseInt(div.style.marginTop); 

    if(dir==1 && y < 0)
    { 
        y += 6; 
        div.style.marginTop = y + 'px'; 
        timer = setTimeout('ScrollDiv(1);',25); 
    } 
    if(dir==-1 && document.getElementById('SkinFrame').scrollHeight-document.getElementById('SkinFrame').offsetHeight > 0)
    { 
        y -= 6; 
        div.style.marginTop = y + 'px'; 
        timer = setTimeout('ScrollDiv(-1);',25); 
    } 
}