var currentSlideNumber = 0;
var slideInterval = 8000;
function but_on(ob_id) {
  ob_name_td="top_menutd_"+ob_id;
  ob_name_l="top_menu_"+ob_id;
  document.getElementById(ob_name_td).style.backgroundColor='#660000';
  document.getElementById(ob_name_l).style.color='#ffffff';
}
function but_out(ob_id) {
  ob_name="top_menutd_"+ob_id;
  ob_name_l="top_menu_"+ob_id;
  document.getElementById(ob_name).style.backgroundColor='#000000';
  document.getElementById(ob_name_l).style.color='#ffffff';
}
function doTrans()
{
  slideCont.filters[0].apply();
  slideCont.children[currentSlideNumber].style.display = "none";
  slideCont.children[currentSlideNumber].style.visibility = "hidden";
  if (++currentSlideNumber >= slideCont.children.length)
  currentSlideNumber = 0;
  slideCont.children[currentSlideNumber].style.display = "";
  slideCont.children[currentSlideNumber].style.visibility = "visible";
  slideCont.filters[0].play();
}

window.setInterval("doTrans()",slideInterval);