var allSupport = document.all!=null
function setupEventObject(e)
{
  // Map NS event object to IEs
  if (e==null) return // IE returns
  window.event = e
  window.event.fromElement = e.target
  window.event.toElement = e.target
  window.event.srcElement = e.target
  window.event.x = e.x
  window.event.y = e.y
  // Route the event to the original element
  // Necessary to make sure _tip is set.
  window.event.srcElement.handleEvent(e);
}

function checkName(src)
{
  // Look for tooltip in IE
  while ((src!=null) && (src._tip==null))
    src = src.parentElement
  return src
}

function getElement(elName)
{
  // Get an element from its ID
  if (allSupport)
    return document.all[elName]
  else
    return document.layers[elName]
}

function writeContents(el, tip)
{
  // Replace the contents of the tooltip
  if (allSupport)
    el.innerHTML = tip
  else
  {
    // In NS, insert a table to work around
    // stylesheet rendering bug.
    // NS fails to apply style sheets when writing
    // contents into a positioned element.
    el.document.open()
    el.document.write("<TABLE WIDTH=200 BORDER=1 bordercolor=black><TR><TD WIDTH=100% BGCOLOR=yellow>")
    el.document.write(tip)
    el.document.write("</TD></TR></TABLE>")
    el.document.close()
  }
}

function getOffset(el, which)
{
  // Function for IE to calculate position 
  // of an element.
  var amount = el["offset"+which] 
  if (which=="Top")
    amount+=el.offsetHeight
  el = el.offsetParent
  while (el!=null)
  {
    amount+=el["offset"+which]
    el = el.offsetParent
  }
  return amount
}

function setPosition(el)
{
  // Set the position of an element
  src = window.event.srcElement
  if (allSupport)
  {
    el.style.pixelTop = getOffset(src, "Top") +10
    el.style.pixelLeft = getOffset(src, "Left") +50
  }
  else
  {
    el.top = src.y + 40 
    el.left = src.x + 40
  }
}

function setVisibility(el, bDisplay)
{
  // Hide or show to tip
  if (bDisplay)
  {
    if (allSupport)
      el.style.visibility = "visible" 
    else
      el.visibility = "show";
  }
  else
  {
    if (allSupport)
      el.style.visibility = "hidden"
    else
      el.visibility = "hidden"
  }
}

function displayContents(tip)
{
  // Display the tooltip. 
  var el = getElement("tipBox")
  writeContents(el, tip)
  setPosition(el)
  setVisibility(el, true)
}

function doMouseOver(e)
{
  // Mouse moves over an element
  setupEventObject(e)
  var el, tip
  if ((el = checkName(window.event.srcElement))!=null)
    if  (!el._display)
	{
      displayContents(el._tip)
      el._display = true
    }
}

function doMouseOut(e)
{
  // Mouse leaves an element
  setupEventObject(e)
  el = checkName(window.event.srcElement)
  var el, tip
  if ((el = checkName(window.event.srcElement))!=null)
    if (el._display)
      if ((el.contains==null) || (!el.contains(window.event.toElement)))
	  {
        setVisibility(getElement("tipBox"), false)
        el._display = false
      }
}

function doLoad()
{
  // Do Loading
  // setInterval("update()", 2000);
  if ((window.document.captureEvents==null) && (!allSupport))
    return // Not IE4 or NS4
  if (window.document.captureEvents!=null)  // NS - capture events
    window.document.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT)
  window.document.onmouseover = doMouseOver;
  window.document.onmouseout = doMouseOut;
}

window.onload = doLoad
//-->
function StraightPath(fromX, fromY, toX, toY, n)
{
  // All path objects must have these 5 methods
  this.x  = fromX;	// Retrieves the current x value
  this.y  = fromY;
  this.step = int_step;			// Move to next step
								// Returns true if the step was succesfull
								// Returns false when the path has been done
  this.reset = int_reset;
  // The rest may vary from different path objects

  this.startX = fromX;
  this.startY = fromY;
  this.endX = toX;
  this.endY = toY;

  // Initiate steps
  this.steps = n;
  this.totalSteps = n;
  if (this.totalSteps < 1)
  {
    // No Amimation!
 	this.x = this.endX;
 	this.y = this.endY;
 	this.deltaX = 0;	// NN work around
 	this.deltaY = 0;
  }
  else
  {
 	this.deltaX = (this.endX - this.startX) / this.totalSteps;
	this.deltaY = (this.endY - this.startY) / this.totalSteps;
  }
  function int_step()
  {
	if (this.steps >= 0)
	{
	  this.steps--;
	  this.x += this.deltaX;
	  this.y += this.deltaY;
	}
	return (this.steps >= 0 );
  }
  function int_reset()
  {
	if (this.totalSteps < 1)
	{
	  this.steps = 0;
	  this.x = this.endX;
	  this.y = this.endY;
	}
	else
	{
	  this.steps = this.totalSteps;
	  this.x = this.startX;
	  this.y = this.startY;
	}
  }
}
//StraightPath.prototype = new Path;