var isMinMAC = (navigator.appVersion.indexOf("Macintosh") >= 0) ? 1 : 0;
var isMinNS = (navigator.appName=="Netscape") ? 1 : 0;
var isMinIE = (document.all) ? 1 : 0;
var isNew = (parseInt(navigator.appVersion)>=5) ? 1 : 0;
var isOld = (parseInt(navigator.appVersion)<=4) ? 1 : 0;

//-----------------------------------------------------------------------------
// Image Swaping
//-----------------------------------------------------------------------------

function fnFindObj(n, d) {
  var p,i,x;  
  if(!d) 
    d=document; 
  
  if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; 
    n=n.substring(0,p);}
  
  if(!(x=d[n])&&d.all) 
    x=d.all[n]; 
    
  for (i=0;!x&&i<d.forms.length;i++) 
    x=d.forms[i][n];
  
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) 
    x=fnFindObj(n,d.layers[i].document); 
    
  return x;
}

function fnSwapImage() { 
  var i,j=0,x,a=fnSwapImage.arguments; 
  
  document.MM_sr=new Array; 
  
  for(i=0;i<(a.length-2);i+=3)
   if ((x=fnFindObj(a[i]))!=null){
     document.MM_sr[j++]=x; 
     if(!x.oSrc) 
       x.oSrc=x.src; 
     x.src=a[i+2];
   }
}

//-----------------------------------------------------------------------------
// Layer writing.
//-----------------------------------------------------------------------------

function fnLayerWrite(layerID,text) {

  var layerObject = (isMinNS && !isNew) ? document.layers[layerID].document : fnGetLayer(layerID);

  if (isMinNS && !isNew) {
  	
    layerObject.open()
    layerObject.write(text)
    layerObject.close()
  }
  else 
    layerObject.innerHTML = text	
}

//-----------------------------------------------------------------------------
// Layer visibility.
//-----------------------------------------------------------------------------

function fnHideLayer(layer) {

  if(typeof(layer)=='object'){
    if (isMinNS && !isNew)
      layer.visibility = "hide";
    if (isMinIE || (isMinNS && isNew))
      layer.style.visibility = "hidden";
  }
}

function fnShowLayer(layer) {

  if (isMinNS && !isNew)
    layer.visibility = "show";
  if (isMinIE || (isMinNS && isNew))
    layer.style.visibility = "visible";
}

function fnInheritLayer(layer) {

  if (isMinNS)
    layer.visibility = "inherit";
  if (isMinIE)
    layer.style.visibility = "inherit";
}

function fnGetVisibility(layer) {

  if (isMinNS) {
    if (layer.visibility == "show")
      return "visible";
    if (layer.visibility == "hide")
      return "hidden";
    return layer.visibility;
  }
  if (isMinIE)
    return layer.style.visibility;
  return "";
}

//-----------------------------------------------------------------------------
// Layer positioning.
//-----------------------------------------------------------------------------

function fnMoveLayerTo(layer, x, y) {
  if (isMinNS && !isNew)
    layer.moveTo(x, y);
  if (isMinIE || (isMinNS && isNew)) {
    layer.style.left = x;
    layer.style.top  = y;
  } 
}

function fnMoveLayerBy(layer, dx, dy) {

  if (isMinNS && !isNew)
    layer.moveBy(dx, dy);
  if (isMinNS && isNew){ 	
    layer.style.left = parseInt(layer.style.left) + dx;
    layer.style.top  = parseInt(layer.style.top) + dy;   
  }  	
  if (isMinIE) {
    layer.style.pixelLeft += dx;
    layer.style.pixelTop  += dy;
  }
}

function fnGetLeft(layer) {

  if (isMinNS)
    return layer.left;   
  if (isMinNS && isNew)
    return parseInt(layer.style.left);     
  if (isMinIE)
    return layer.style.pixelLeft;
  return -1;  
}

function fnGetTop(layer) {

  if (isMinNS && !isNew)
    return layer.top;
  if (isMinNS && isNew)
    return parseInt(layer.style.top);
  if (isMinIE)
    return layer.style.pixelTop;
  return -1;
}

function fnGetRight(layer) {

  if (isMinNS)
    return layer.left + fnGetWidth(layer);
  if (isMinIE)
    return layer.style.pixelLeft + fnGetWidth(layer);
  return -1;
}

function fnGetBottom(layer) {

  if (isMinNS)
    return layer.top + fnGetHeight(layer);
  if (isMinIE)
    return layer.style.pixelTop + fnGetHeight(layer);
  return -1;
}

function fnGetPageLeft(layer) {

  var x;

  if (isMinNS)
    return layer.pageX;
  if (isMinIE) {
    x = 0;
    while (layer.offsetParent != null) {
      x += layer.offsetLeft;
      layer = layer.offsetParent;
    }
    x += layer.offsetLeft;
    return x;
  }
  return -1;
}

function fnGetPageTop(layer) {

  var y;

  if (isMinNS)
    return layer.pageY;
  if (isMinIE) {
    y = 0;
    while (layer.offsetParent != null) {
      y += layer.offsetTop;
      layer = layer.offsetParent;
    }
    y += layer.offsetTop;
    return y;
  }
  return -1;
}

function fnGetWidth(layer) {
	
  if (isMinNS && !isNew) {
    if (layer.document.width)
      return layer.document.width;
    else
      return layer.clip.right - layer.clip.left;
  }
  if (isMinIE || (isMinNS && isNew)) {	
    if (layer.style.pixelWidth)
      return layer.style.pixelWidth;
    else
      return layer.clientWidth;
  }
  return -1;
}

function fnGetHeight(layer) {

  if (isMinNS) {
    if (layer.document.height)
      return layer.document.height;
    else
      return layer.clip.bottom - layer.clip.top;
  }
  if (isMinIE) {
    if (layer.style.pixelHeight)
      return layer.style.pixelHeight;
    else
      return layer.clientHeight;
  }
  return -1;
}

function fnGetzIndex(layer) {

  if (isMinNS)
    return layer.zIndex;
  if (isMinIE)
    return layer.style.zIndex;

  return -1;
}

function fnSetzIndex(layer, z) {

  if (isMinNS)
    layer.zIndex = z;
  if (isMinIE)
    layer.style.zIndex = z;
}

//-----------------------------------------------------------------------------
// Layer clipping.
//-----------------------------------------------------------------------------

function fnClipLayer(layer, clipleft, cliptop, clipright, clipbottom) {

  if (isMinNS) {
    layer.clip.left   = clipleft;
    layer.clip.top    = cliptop;
    layer.clip.right  = clipright;
    layer.clip.bottom = clipbottom;
  }
  if (isMinIE)
    layer.style.clip = 'rect(' + cliptop + ' ' +  clipright + ' ' + clipbottom + ' ' + clipleft +')';
}

function fnGetClipLeft(layer) {

  if (isMinNS)
    return layer.clip.left;
  if (isMinIE) {
    var str =  layer.style.clip;
    if (!str)
      return 0;
    var clip = fnGetIEClipValues(layer.style.clip);
    return(clip[3]);
  }
  return -1;
}

function fnGetClipTop(layer) {

  if (isMinNS)
    return layer.clip.top;
  if (isMinIE) {
    var str =  layer.style.clip;
    if (!str)
      return 0;
    var clip = fnGetIEClipValues(layer.style.clip);
    return clip[0];
  }
  return -1;
}

function fnGetClipRight(layer) {

  if (isMinNS)
    return layer.clip.right;
  if (isMinIE) {
    var str =  layer.style.clip;
    if (!str)
      return layer.style.pixelWidth;
    var clip = fnGetIEClipValues(layer.style.clip);
    return clip[1];
  }
  return -1;
}

function fnGetClipBottom(layer) {

  if (isMinNS)
    return layer.clip.bottom;
  if (isMinIE) {
    var str =  layer.style.clip;
    if (!str)
      return layer.style.pixelHeight;
    var clip = fnGetIEClipValues(layer.style.clip);
    return clip[2];
  }
  return -1;
}

function fnGetClipWidth(layer) {

  if (isMinNS)
    return layer.clip.width;
  if (isMinIE) {
    var str = layer.style.clip;
    if (!str)
      return layer.style.pixelWidth;
    var clip = fnGetIEClipValues(layer.style.clip);
    return clip[1] - clip[3];
  }
  return -1;
}

function fnGetClipHeight(layer) {

  if (isMinNS)
    return layer.clip.height;
  if (isMinIE) {
    var str =  layer.style.clip;
    if (!str)
      return layer.style.pixelHeight;
    var clip = fnGetIEClipValues(layer.style.clip);
    return clip[2] - clip[0];
  }
  return -1;
}

function fnGetIEClipValues(str) {

  var clip = new Array();
  var i;

  // Parse out the clipping values for IE layers.

  i = str.indexOf("(");
  clip[0] = parseInt(str.substring(i + 1, str.length), 10);
  i = str.indexOf(" ", i + 1);
  clip[1] = parseInt(str.substring(i + 1, str.length), 10);
  i = str.indexOf(" ", i + 1);
  clip[2] = parseInt(str.substring(i + 1, str.length), 10);
  i = str.indexOf(" ", i + 1);
  clip[3] = parseInt(str.substring(i + 1, str.length), 10);
  return clip;
}

//-----------------------------------------------------------------------------
// Layer scrolling.
//-----------------------------------------------------------------------------

function fnScrollLayerTo(layer, x, y, bound) {

  var dx = fnGetClipLeft(layer) - x;
  var dy = fnGetClipTop(layer) - y;

  fnScrollLayerBy(layer, -dx, -dy, bound);
}

function fnScrollLayerBy(layer, dx, dy, bound) {

  var cl = fnGetClipLeft(layer);
  var ct = fnGetClipTop(layer);
  var cr = fnGetClipRight(layer);
  var cb = fnGetClipBottom(layer);

  if (bound) {
    if (cl + dx < 0)
      dx = -cl;
    else if (cr + dx > fnGetWidth(layer))
      dx = fnGetWidth(layer) - cr;
    if (ct + dy < 0)
      dy = -ct;
    else if (cb + dy > fnGetHeight(layer))
      dy = fnGetHeight(layer) - cb;
  }
  fnClipLayer(layer, cl + dx, ct + dy, cr + dx, cb + dy);
  fnMoveLayerBy(layer, -dx, -dy);
}

//-----------------------------------------------------------------------------
// Layer background.
//-----------------------------------------------------------------------------

function fnSetBgColour(layer, colour) {

  if (isMinNS)
    layer.bgColour = colour;
  if (isMinIE)
    layer.style.backgroundColour = colour;
}

function fnSetBgImage(layer, src) {

  if (isMinNS)
    layer.background.src = src;
  if (isMinIE)
    layer.style.backgroundImage = "url(" + src + ")";
}

//-----------------------------------------------------------------------------
// Layer utilities.
//-----------------------------------------------------------------------------

function fnGetLayer(name) {

  if (isMinNS && !isNew)
    return fnFindLayer(name, document);
  if (isMinNS && isNew)
    return document.getElementById(name);
  if (isMinIE)
    return eval('document.all.' + name);
  return null;
}

function fnFindLayer(name, doc) {

  var i, layer;
  for (i = 0; i < doc.layers.length; i++) {
    layer = doc.layers[i];  
    if (layer.name == name)
      return layer;
    if (layer.document.layers.length > 0)
      if ((layer = fnFindLayer(name, layer.document)) != null)
        return layer;
  }
  return null;
}

//-----------------------------------------------------------------------------
// Image utilities.
//-----------------------------------------------------------------------------

function fnGetImage(name) {

  if (isMinNS) {
    return fnFindImage(name, document);
  }
  if (isMinIE)
    return eval('document.all.' + name);
  return null;
}

function fnFindImage(name, doc) {

  var i, img;

  for (i = 0; i < doc.images.length; i++)
    if (doc.images[i].name == name)
      return doc.images[i];
  for (i = 0; i < doc.layers.length; i++)
    if ((img = fnFindImage(name, doc.layers[i].document)) != null) {
      img.container = doc.layers[i];
      return img;
    }
  return null;
}

function fnGetImagePageLeft(img) {

  var x, obj;

  if (isMinNS && !isNew) {
    if (img.container != null)
      return img.container.pageX + img.x;
    else
      return img.x;
  }
  if (isMinIE || (isMinNS && isNew)) {
    x = 0;
    obj = img;
    while (obj.offsetParent != null) {
      x += obj.offsetLeft;
      obj = obj.offsetParent;
    }
    x += obj.offsetLeft;
    return x;
  }
  return -1;
}

function fnGetImagePageTop(img) {

  var y, obj;

  if (isMinNS && !isNew) {
    if (img.container != null)
      return img.container.pageY + img.y;
    else
      return img.y;
  }
  if (isMinIE || (isMinNS && isNew)) {
    y = 0;
    obj = img;
    while (obj.offsetParent != null) {
      y += obj.offsetTop;
      obj = obj.offsetParent;
    }
    y += obj.offsetTop;
    return y;
  }
  return -1;
}

//-----------------------------------------------------------------------------
// Window and page properties.
//-----------------------------------------------------------------------------

function fnGetWindowWidth() {

  if (isMinNS)
    return window.innerWidth;
  if (isMinIE)
    return document.body.clientWidth;
  return -1;
}

function fnGetWindowHeight() {

  if (isMinNS)
    return window.innerHeight;
  if (isMinIE)
    return document.body.clientHeight;
  return -1;
}

function fnGetPageWidth() {

  if (isMinNS)
    return document.width;
  if (isMinIE)
    return document.body.scrollWidth;
  return -1;
}

function fnGetPageHeight() {

  if (isMinNS)
    return document.height;
  if (isMinIE)
    return document.body.scrollHeight;
  return -1;
}

function fnGetPageScrollX() {

  if (isMinNS)
    return window.pageXOffset;
  if (isMinIE)
    return document.body.scrollLeft;
  return -1;
}

function fnGetPageScrollY() {

  if (isMinNS)
    return window.pageYOffset;
  if (isMinIE)
    return document.body.scrollTop;
  return -1;
}

//-----------------------------------------------------------------------------
// Mouse Pointer
//-----------------------------------------------------------------------------

function fnSetPointer() { 
  if (document.all && !isMinMAC) 
    for (var i=0;i < document.all.length; i++) 
      document.all(i).style.cursor = 'wait'; 
} 

function fnResetPointer() { 
  if (document.all && !isMinMAC) 
    for (var i=0;i < document.all.length; i++) 
      document.all(i).style.cursor = 'default'; 
}