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();

var isIE6 = navigator.userAgent.toLowerCase().indexOf('msie 6') != -1;
var isIE7 = navigator.userAgent.toLowerCase().indexOf('msie 7') != -1;

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 opendown(objname)
{
  obj[objname] = document.getElementById(objname);
  obj[objname].style.display = "block";
  
  if (obj[objname].style.height == '')
  {
    var scrollheight = document.getElementById(objname).scrollHeight;
    scrollheight = document.getElementById(objname).scrollHeight;
    var height = (obj[objname].clientHeight > 0 ? obj[objname].clientHeight : scrollheight);
    obj[objname].style.height = parseInt(height) + "px";
  }
}

function startslide(objname)
{

  if (!isIE6 && !isIE7)
  {
    obj[objname] = document.getElementById(objname);

    /*
    document.title = 'ch: ' + parseInt(obj[objname].clientHeight)
    document.title += ' | oh: ' + parseInt(obj[objname].offsetHeight);
    */

    if (obj[objname].style.height == '')
    {
      obj[objname].style.display = "block";
      var scrollheight = document.getElementById(objname).scrollHeight;
      scrollheight = document.getElementById(objname).scrollHeight;
      var height = (obj[objname].clientHeight > 0 ? obj[objname].clientHeight : scrollheight);
      endHeight[objname] = parseInt(height);
      obj[objname].style.display = "none";
      //start pos is close
      moving[objname] = true;
      dir[objname] = "up";
    }
    else
      endHeight[objname] = parseInt(obj[objname].style.height);

    startTime[objname] = (new Date()).getTime();

    if (dir[objname] == "down")
    {
      obj[objname].style.height = "0px";
    }

    obj[objname].style.display = "block";

    timerID[objname] = setInterval('slidetick(\'' + objname + '\');',timerlen);
  } else {
  
    obj[objname] = document.getElementById(objname);
    obj[objname].style.display = "none";
  
  }
}//startslide

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;
}//endSlide

function slide(objname)
{

  if (!isIE6 && !isIE7)
  {
  
    if(moving[objname])
      return;
    if(document.getElementById(objname).style.display == "none")
      slidedown(objname);
    else
      slideup(objname);
      
  } else {

    if(document.getElementById(objname).style.display == "none")
      document.getElementById(objname).style.display = "block";
    else
      document.getElementById(objname).style.display = "none";
  
  }
  
}//slide