var graphics = new Array ();
var countGraph = 0, prevID = 0, prev1 = -1, prev2 = -1, activeFoo = "";

// Script code Copyright MyRo 1999-2003

function errorHandler(message, url, line)
{
   if (activeFoo != "showImage")
   {
     window.alert ("Een fout gebeurde: " + message + "\n op de lijn:" +  line + "\n in: " + url);
     // stop the event from bubbling up to the default window.onerror handler
   }
   return true;
}

// install the global error-handler
window.onerror = errorHandler;

function CBrowserVersion()
{
  this.ver=navigator.appVersion;
  this.agent=navigator.userAgent.toLowerCase();
  this.dom=document.getElementById?1:0;
  this.opera = -1;
  if (window.opera)
  {
    if (this.agent.indexOf("opera 5")>-1 || this.agent.indexOf("opera/5")>-1)
      this.opera = 500;
   else if (this.agent.indexOf("opera 6")>-1 || this.agent.indexOf("opera/6")>-1)
     this.opera = 600;
  }
  this.ie = -1;
  if (this.opera < 0)
  {
    pos = this.agent.indexOf ("msie");
    if (pos >= 0)
    {
      pos += 5;
      this.ie = parseFloat (this.agent.substr (pos, pos + 6)) * 100;
    }
  }
  this.mac=(this.agent.indexOf("mac")>-1);
  this.ns = -1;
  this.firefox = -1;
  this.mozila = -1;
  if (this.agent.indexOf("firefox") > -1)
  {
    pos = this.agent.indexOf("firefox") + 8;
    this.firefox = parseFloat (this.agent.substring (pos, pos + 6)) * 100;
  }
  else if (this.agent.indexOf("gecko")>-1 || window.sidebar)
  {
    this.ns = 600;
    pos = this.agent.indexOf ("netscape");
    if (pos > 0)
    {
      pos += 9;
      this.ns = parseFloat (this.agent.substr (pos, pos + 6)) * 100;
      if (this.ns < 600)
        this.ns = 600;
    } 
    else
    {
      pos = this.agent.indexOf ("rv:");
      if (pos > 0)
      {
        pos += 3;
        this.mozilla = parseFloat (this.agent.substr (pos, pos + 6)) * 100;
      } 
    }
  }
  else if (!this.dom && document.layers)
    this.ns = 400;
  this.usedom= this.ns >= 600 || this.firefox >= 0;
  this.reuse = this.ie >= 400  || this.usedom || this.firefox >= 0;//Reuse layers
  this.useDhtml= this.ie >= 400 || this.firefox >= 0 || this.ns >= 500;
  this.useLayer=this.ns == 400;
  this.supportError=this.ie >= 500 || this.ns >= 600 || this.firefox >= 0;

  if (document.all)
    GetObjectByRef = function (nm) {return window.document.all [nm];};
  else if (document.getElementById)
    GetObjectByRef = function (nm) {return document.getElementById (nm);};
  else if (document.layers)
    GetObjectByRef = function (nm) {return document.layers [nm];};
  else
    GetObjectByRef = null;

  if (this.ie >= 400)
    GetParentNode = function(obj) {return obj ? obj.parentElement : NULL;};
  else
    GetParentNode = function (obj) {return obj ? obj.parentNode : NULL;};

  return this;
}

var browserVersion=new CBrowserVersion();

function InitGetObject ()
{
}

function IEVersion ()
{
  if (browserVersion == null)
    return 0;
  return browserVersion.ie;
}

function NSVersion ()
{
  if (browserVersion == null)
    return 0;
  return browserVersion.ns;
}

function FireFoxVersion ()
{
  if (browserVersion == null)
    return 0;
  return browserVersion.firefox;
}

function MozillaVersion ()
{
  if (browserVersion == null)
    return 0;
  return browserVersion.mozilla;
}

function SupportDHTML ()
{
  if (browserVersion == null)
    return false;
  return browserVersion.useDhtml;
}

function SupportLayers ()
{
  if (browserVersion == null)
    return false;
  return browserVersion.useLayer;
}

function SupportAnimation ()
{
  if (browserVersion == null)
    return false;
  return browserVersion.ie >= 550;
}

function CreateGraph (nameGraph, width, height)
{
  if ( SupportDHTML ())
  {
    this.image = new Image ();
    this.image.src = nameGraph;
    this.image.width = width;
    this.image.height = height;
  } // if
}

function AddGraph (nameGraph, width, height)
{
  graphics [countGraph] = new CreateGraph (nameGraph, width, height);
  return countGraph++;
}

function showImage (b, index)
{
  activeFoo = "showImage";
  var src;
  src=b.src;
  b.src = graphics [index].image.src;
  if (b.readyState == "uninitialized") 
  {
    b.src = src;
  }
  activeFoo = "";
}

function getImage (index)
{
  return graphics [index].image.src;
}

var prevOpen = null;

function toggle(id)
{
  if (!GetObjectByRef)
    return;
  var obj = GetObjectByRef (id);
  if (prevOpen)
    prevOpen.style.display = "none";  
  if (obj.style.display=="none")
  {
    obj.style.display = "";
    prevOpen = null;
  }
  else
  {
    obj.style.display = "none";
    prevOpen = obj;
  }
}

function hideObject(id)
{
  if (!GetObjectByRef)
    return;
    
  var obj = GetObjectByRef (id);
  if (obj)
    obj.style.display = "none";
}

function showObject(id)
{
  if (!GetObjectByRef)
    return;
    
  var obj = GetObjectByRef (id);
  if (obj)
    obj.style.display = "";
}