var scrollActive = false, scrollStop = true, scrollIncrement = 10, scrollIncrementAuto = 1, scrollInterval = 60, scrollIntervalAuto = 60, scc ='', scb='';

function tanimla(sc,sb)
{
	scc = sc;
	scb = sb;
	
	if (!scrollActive) {
    scrollStop = false;
  }
}

function birak()
{
  scrollStop = true;
  scrollActive = false;
}

function asagi()
{	
	if (!scrollStop) {
    scrollActive = true;
    setTimeout('asagi()', scrollInterval);
    var sc = xGetElementById(scc);
    var y = xTop(sc) - scrollIncrement;
    if (y >= -(xHeight(sc) - xHeight(scb))) {
      xTop(sc, y);
    }else {
      scrollStop = true;
      scrollActive = false;
    }
  }
}

function yukari()
{
	if (!scrollStop) {
    scrollActive = true;
    setTimeout('yukari()', scrollInterval);
    var sc = xGetElementById(scc);
    var y = xTop(sc) + scrollIncrement;
    if (y <= 0) {
      xTop(sc, y);
    }else {
      scrollStop = true;
      scrollActive = false;
    }
  }
}

function oynat()
{
  if (!scrollStop) {
    scrollActive = true;
    setTimeout('oynat()', scrollIntervalAuto);
    var sc = xGetElementById(scc);
    var y = xTop(sc) - scrollIncrementAuto;
    if (y >= -(xHeight(sc) - (xHeight(scb)*2))) {
      xTop(sc, y);
    }
    else {
      xTop(sc, xHeight(scb));
    }
  }
}

function baslat()
{
	var sc = xGetElementById(scc);
	xTop(sc,xHeight(scb));
	oynat();
	}