function enableTooltips(id)
{
  var links, i, h;
  if (!document.getElementById || !document.getElementsByTagName) 
  {
    return;
  }
  AddCss();
  h = document.createElement("span");
  h.id = "btc";
  h.setAttribute("id", "btc");
  h.style.position = "absolute";
  document.getElementsByTagName("body")[0].appendChild(h);
  if (id == null) 
  {
    links = document.getElementsByTagName("img");
  }
  else 
  {
    links = document.getElementById(id).getElementsByTagName("img");
  }
  for (i = 0; i < links.length; i++) 
  {
    Prepare(links[i]);
  }
}

function Prepare(el)
{
  var tooltip, t, b, s, l;
  t = el.getAttribute("title");
  if (t == null || t.length == 0) 
	{
		return;
	}
	el.style.cursor='help';
  el.removeAttribute("title");	
  tooltip = CreateEl("span", "tooltip");
  s = CreateEl("span", "top");
  s.appendChild(document.createTextNode(t));
  tooltip.appendChild(s);
  b = CreateEl("b", "bottom");
  tooltip.appendChild(b);
  setOpacity(tooltip);
  el.tooltip = tooltip;
  el.onmouseover = showTooltip;
  el.onmouseout = hideTooltip;
  el.onmousemove = Locate;
}

function showTooltip(e)
{
  document.getElementById("btc").appendChild(this.tooltip);
  Locate(e);
}

function hideTooltip(e)
{
  var d = document.getElementById("btc");
  if (d.childNodes.length > 0) 
	{
		d.removeChild(d.firstChild);
	}
}

function setOpacity(el)
{
  el.style.filter = "alpha(opacity:90)";
  el.style.KHTMLOpacity = "0.90";
  el.style.MozOpacity = "0.90";
  el.style.opacity = "0.90";
}

function CreateEl(t, c)
{
  var x = document.createElement(t);
  x.className = c;
  x.style.display = "block";
  return (x);
}

function AddCss()
{
	/*
  var l = CreateEl("link");
  l.setAttribute("type", "text/css");
  l.setAttribute("rel", "stylesheet");
  l.setAttribute("href", "bt.css");
  l.setAttribute("media", "screen");
  document.getElementsByTagName("head")[0].appendChild(l);
  */
}

function Locate(e)
{
  var posx = 0, posy = 0;
  if (e == null) 
	{
		e = window.event;
	}
  if (e.pageX || e.pageY) 
	{
		posx = e.pageX;
		posy = e.pageY;
	}
	else 
	{
		if (e.clientX || e.clientY) 
		{
			if (document.documentElement.scrollTop) 
			{
				posx = e.clientX + document.documentElement.scrollLeft;
				posy = e.clientY + document.documentElement.scrollTop;
			}
			else 
			{
				posx = e.clientX + document.body.scrollLeft;
				posy = e.clientY + document.body.scrollTop;
			}
		}
	}
  document.getElementById("btc").style.top = (posy + 15) + "px";
  document.getElementById("btc").style.left = (posx - 0) + "px";
}