function ca_scrollTop(scroller, px, e){
    if(px!='auto') document.getElementById(scroller).scrollTop = parseInt(document.getElementById(scroller).scrollTop)-px;
    else document.getElementById(scroller).scrollTop = parseInt(document.getElementById(scroller).scrollTop)-document.getElementById(e).offsetHeight;
    return false;
}

function ca_scrollBottom(scroller, px, e){
    if(px!='auto') document.getElementById(scroller).scrollTop = parseInt(document.getElementById(scroller).scrollTop)+px;
    else document.getElementById(scroller).scrollTop = parseInt(document.getElementById(scroller).scrollTop)+document.getElementById(e).offsetHeight;
    return false;
}