//
var ceiling = -600;
var initPos = ceiling;
var upline = 600;
var stpFlg = 'False';
//
function scrollUp(scrLayer){ 
    if (upline > ceiling) { 
       upline -= 2;
       document.all[scrLayer].style.top = upline;
       scrStp=setTimeout('scrollUp("'+scrLayer+'")', 50)
    }else {
       scrollStp(scrLayer)
    }
}
function scrCtr(scrLayer){
    stpFlg ? scrollStp(scrLayer) : scrollAgn(scrLayer);
    stpFlg = !(stpFlg);
}
function scrollStp(scrLayer){
    clearTimeout(scrStp)
}
function scrollAgn(scrLayer){
        ceiling=initPos;
        scrollUp(scrLayer)
}
//