function movingDown(signe_browser,ly,signe_up,newposDown,stepDown,limitStep,limitDown,dtime){
if (signe_up==0) {
if (signe_browser==0) newposDown=document[ly].top;
signe_up=1;
stepDown=newposDown/2;
}
if (newposDown < limitDown ) {
newposDown=newposDown+stepDown;
if (stepDown > limitStep) stepDown=stepDown/2;
if (signe_browser==0) document[ly].top=newposDown;
if (signe_browser==1) document.all[ly].style.top=newposDown;
var timeout_id_movingDown=setTimeout("movingDown("+signe_browser+",'"+ly+"',"+signe_up+","+newposDown+","+stepDown+","+limitStep+","+limitDown+","+dtime+")", dtime);