var timerlen=5;var slideAniLen=500;var timerID=new Array();var startTime=new Array();var obj=new Array();var endHeight=new Array();var moving=new Array();var dir=new Array();
function toggleSlide(objname){
  if(document.getElementById(objname).style.display == "none"){
    slidedown(objname);
  }else{
    slideup(objname);
  }
}
function startSlide(objname)  {
  var boxHeight = document.getElementById(objname).offsetHeight;
  document.getElementById(objname).style.height = boxHeight + 'px';
  if(document.getElementById(objname).style.display == "none"){
    slidedown(objname);
  }else{
    slideup(objname);
  }
}
function slidedown(objname){
  if(moving[objname])
    return;
  if(document.getElementById(objname).style.display != "none")
    return;
  moving[objname] = true;
  dir[objname] = "down";
  startslide(objname);
}
function slideup(objname){
  if(moving[objname])
    return;
  if(document.getElementById(objname).style.display == "none")
    return;
  moving[objname] = true;
  dir[objname] = "up";
  startslide(objname);
}
function startslide(objname){
  obj[objname] = document.getElementById(objname);
  endHeight[objname] = parseInt(obj[objname].style.height);
  startTime[objname] = (new Date()).getTime();
  if(dir[objname] == "down"){
    obj[objname].style.height = "1px";
  }
  obj[objname].style.display = "block";
  timerID[objname] = setInterval('slidetick(\'' + objname + '\');',timerlen);
}
function slidetick(objname){
  var elapsed = (new Date()).getTime() - startTime[objname];
  if (elapsed > slideAniLen)
    endSlide(objname)
  else {
    var d =Math.round(elapsed / slideAniLen * endHeight[objname]);
    if(dir[objname] == "up")
      d = endHeight[objname] - d;
    obj[objname].style.height = d + "px";
  }
  return;
}
function endSlide(objname){
  clearInterval(timerID[objname]);
  if(dir[objname] == "up")
    obj[objname].style.display = "none";
  obj[objname].style.height = endHeight[objname] + "px";
  delete(moving[objname]);
  delete(timerID[objname]);
  delete(startTime[objname]);
  delete(endHeight[objname]);
  delete(obj[objname]);
  delete(dir[objname]);
  return;
}