function ScrollUp() { 

window.frames.slideshow.scrollBy(0,-1);

}

function StartScrollUp() { 

ScrollAction = window.setInterval("ScrollUp()", 10);

}

function ScrollDown() { 

window.frames.slideshow.scrollBy(0,1);

}

function StartScrollDown() { 

ScrollAction = window.setInterval("ScrollDown()", 10);

}

function StopScroll() { 

window.clearInterval(ScrollAction);

}