/******************************************************************************
* dhtmllib.js                                                                 *
*                                                                             *
* Copyright 1999 by Mike Hall.                                                *
* Web address: http://www.brainjar.com                                        *
* Last update: February 26, 2000.                                             *
*                                                                             *
* Provides basic functions for DHTML positioned elements which will work on   *
* both Netscape Communicator and Internet Explorer browsers (version 4.0 and  *
* up).                                                                        *
******************************************************************************/

// Determine browser.

var isMinNS4 = (navigator.appName.indexOf("Netscape") >= 0 &&
                parseFloat(navigator.appVersion) >= 4 && parseFloat(navigator.appVersion) < 5) ? 1 : 0;
var isMinNS6 = 	(navigator.appName.indexOf("Netscape") >= 0 &&
                parseFloat(navigator.appVersion) >= 5) ? 1 : 0;		
var isMinIE4 = (document.all) ? 1 : 0;
var isMinIE5 = (isMinIE4 && (navigator.appVersion.indexOf("5.") >= 0 | navigator.appVersion.indexOf("6.") >= 0) ) ? 1 : 0;
var HeightOfLayer = 18;

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

function hideLayer(layer) {

  if (isMinNS4)
    layer.visibility = "hide";
  if (isMinIE4 || isMinNS6)
    layer.style.visibility = "hidden";
}

function showLayer(layer) {

  if (isMinNS4)
    layer.visibility = "show";
  if (isMinIE4 || isMinNS6)
    layer.style.visibility = "visible";
}

function inheritLayer(layer) {

  if (isMinNS4)
    layer.visibility = "inherit";
  if (isMinIE4 || isMinNS6)
    layer.style.visibility = "inherit";
}

function getVisibility(layer) {

  if (isMinNS6) {
  	return layer.style.visibility;
  }
  if (isMinNS4) {
    if (layer.visibility == "show")
      return "visible";
    if (layer.visibility == "hide")
      return "hidden";
    return layer.visibility;
  }
  if (isMinIE4 || isMinNS6)
    return layer.style.visibility;
  return "";
}

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

function moveLayerTo(layer, x, y) {
  if (isMinNS6) {
    layer.style.left = x;
    layer.style.top  = y;
  }
  if (isMinIE4) {
  	layer.style.left = x;
    layer.style.top  = y;
  }
  if (isMinNS4)
    layer.moveTo(x, y);
}

function moveLayerBy(layer, dx, dy) {

  if (isMinNS4)
    layer.moveBy(dx, dy);
  if (isMinIE4) {
    layer.style.Left += dx;
    layer.style.Top  += dy;
  }
  if (isMinNS6) {
    layer.style.Left = parseInt(layer.style.Left) + dx + "px";
    layer.style.Top = parseInt(layer.style.Top) + dy + "px";
  }
}

function getLeft(layer) {

  if (isMinNS4)
    return layer.left;
  if (isMinIE4 || isMinNS6)
    return layer.style.Left;
  return -1;
}

function getTop(layer) {

  if (isMinNS4)
    return layer.top;
  if (isMinIE4 || isMinNS6)
    return layer.style.Top;
  return -1;
}

function getRight(layer) {

  if (isMinNS4)
    return layer.left + getWidth(layer);
  if (isMinIE4 || isMinNS6)
    return layer.style.Left + getWidth(layer);
  return -1;
}

function getBottom(layer) {

  if (isMinNS4)
    return layer.top + getHeight(layer);
  if (isMinIE4 || isMinNS6)
    return layer.style.Top + getHeight(layer);
  return -1;
}

function getPageLeft(layer) {

  var x;

  if (isMinNS4)
    return layer.pageX;
	
  
  if (isMinNS6) {
    x = 0;
    while (obj.offsetParent != document.documentElement) {
      x += layer.offsetLeft;
      layer = layer.offsetParent;
    }
    x += layer.offsetLeft;
    return x;
  }	
  if (isMinIE4) {
    x = 0;
    while (layer.offsetParent != null) {
      x += layer.offsetLeft;
      layer = layer.offsetParent;
    }
    x += layer.offsetLeft;
    return x;
  }
  return -1;
}

function getPageTop(layer) {

  var y;

  if (isMinNS4)
    return layer.pageY;
  if (isMinNS6) {
    y = 0;
    while (obj.offsetParent != document.documentElement) {
      y += layer.offsetTop;
      layer = layer.offsetParent;
    }
    y += layer.offsetTop;
    return y;
  }	
  if (isMinIE4) {
    y = 0;
    while (layer.offsetParent != null) {
      y += layer.offsetTop;
      layer = layer.offsetParent;
    }
    y += layer.offsetTop;
    return y;
  }
  return -1;
}

function getWidth(layer) {

  if (isMinNS4) {
    if (layer.document.width)
      return layer.document.width;
    else
      return layer.clip.right - layer.clip.left;
  }
  if (isMinIE4 || isMinNS6) {
    if (layer.style.pixelWidth)
      return layer.style.pixelWidth;
    else
      return layer.clientWidth;
  }
  return -1;
}

function getHeight(layer) {
   
  if (isMinNS4) {
    if (layer.document.height)
      return layer.document.height;
    else
      return layer.clip.bottom - layer.clip.top;
  }
  if (isMinIE4) {
    if (layer.style.pixelHeight)
      return layer.style.pixelHeight;
    else
      return layer.clientHeight;
  }
  if (isMinNS6) {
    if (layer.style.pixelHeight)
      return layer.style.pixelHeight;
	else if (layer.style.height)
	  return layer.style.height;
	else if (layer.style.clientHeight)
	  return layer.style.clientHeight;	  
    else {
	  var NumOfRows = 0;
      var br_index = 1;
      while (br_index > 0) {
  	    br_index = layer.innerHTML.toUpperCase().indexOf("<BR>", br_index) + 1;
	    NumOfRows += 1;
	  }
	  return HeightOfLayer * NumOfRows;
	}
//This is a hack, somehow the height can't be returned from the layer object that is sent to this function
  }
  return -1;
}

function getzIndex(layer) {

  if (isMinNS4)
    return layer.zIndex;
  if (isMinIE4 || isMinNS6)
    return layer.style.zIndex;

  return -1;
}

function setzIndex(layer, z) {

  if (isMinNS4)
    layer.zIndex = z;
  if (isMinIE4 || isMinNS6)
    layer.style.zIndex = z;
}

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

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

  if (isMinNS4) {
    layer.clip.left   = clipleft;
    layer.clip.top    = cliptop;
    layer.clip.right  = clipright;
    layer.clip.bottom = clipbottom;
  }
  if (isMinIE4 || isMinNS6)
    layer.style.clip = 'rect(' + cliptop + ' ' +  clipright + ' ' + clipbottom + ' ' + clipleft +')';
}

function getClipLeft(layer) {

  if (isMinNS4)
    return layer.clip.left;
  if (isMinIE4 || isMinNS6) {
    var str =  layer.style.clip;
    if (!str)
      return 0;
    var clip = getIEClipValues(layer.style.clip);
    return(clip[3]);
  }
  return -1;
}

function getClipTop(layer) {

  if (isMinNS4)
    return layer.clip.top;
  if (isMinIE4 || isMinNS6) {
    var str =  layer.style.clip;
    if (!str)
      return 0;
    var clip = getIEClipValues(layer.style.clip);
    return clip[0];
  }
  return -1;
}

function getClipRight(layer) {

  if (isMinNS4)
    return layer.clip.right;
  if (isMinIE4 || isMinNS6) {
    var str =  layer.style.clip;
    if (!str)
      return layer.style.Width;
    var clip = getIEClipValues(layer.style.clip);
    return clip[1];
  }
  return -1;
}

function getClipBottom(layer) {

  if (isMinNS4)
    return layer.clip.bottom;
  if (isMinIE4 || isMinNS6) {
    var str =  layer.style.clip;
    if (!str)
      return layer.style.pixelHeight;
    var clip = getIEClipValues(layer.style.clip);
    return clip[2];
  }
  return -1;
}

function getClipWidth(layer) {

  if (isMinNS4)
    return layer.clip.width;
  if (isMinIE4 || isMinNS6) {
    var str = layer.style.clip;
    if (!str)
      return layer.style.pixelWidth;
    var clip = getIEClipValues(layer.style.clip);
    return clip[1] - clip[3];
  }
  return -1;
}


function getIEClipValues(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 scrollLayerTo(layer, x, y, bound) {

  var dx = getClipLeft(layer) - x;
  var dy = getClipTop(layer) - y;

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

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

  var cl = getClipLeft(layer);
  var ct = getClipTop(layer);
  var cr = getClipRight(layer);
  var cb = getClipBottom(layer);

  if (bound) {
    if (cl + dx < 0)
      dx = -cl;
    else if (cr + dx > getWidth(layer))
      dx = getWidth(layer) - cr;
    if (ct + dy < 0)
      dy = -ct;
    else if (cb + dy > getHeight(layer))
      dy = getHeight(layer) - cb;
  }
  clipLayer(layer, cl + dx, ct + dy, cr + dx, cb + dy);
  moveLayerBy(layer, -dx, -dy);
}

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

function setBgColor(layer, color) {

  if (isMinNS4)
    layer.bgColor = color;
  if (isMinIE4 || isMinNS6)
    layer.style.backgroundColor = color;
}

function setBgImage(layer, src) {

  if (isMinNS4)
    layer.background.src = src;
  if (isMinIE4 || isMinNS6)
    layer.style.backgroundImage = "url(" + src + ")";
}

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

function getLayer(name) {
  if (isMinNS6)
  	return document.getElementById(name);
  if (isMinNS4)
    return findLayer(name, document);
  if (isMinIE4)
    return eval('document.all.' + name);
  return null;
}

function findLayer(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 = findLayer(name, layer.document)) != null)
        return layer;
  }
  return null;
}


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

function getWindowWidth() {

  if (isMinNS4)
    return window.innerWidth;
  if (isMinIE4 || isMinNS6)
    return document.body.clientWidth;
  return -1;
}

function getWindowHeight() {

  if (isMinNS4)
    return window.innerHeight;
  if (isMinIE4 || isMinNS6)
    return document.body.clientHeight;
  return -1;
}

function getPageWidth() {

  if (isMinNS4)
    return document.width;
  if (isMinIE4 || isMinNS6)
    return document.body.scrollWidth;
  return -1;
}

function getPageHeight() {

  if (isMinNS4)
    return document.height;
  if (isMinIE4 || isMinNS6)
    return document.body.scrollHeight;
  return -1;
}

function getPageScrollX() {

  if (isMinNS4)
    return window.pageXOffset;
  if (isMinIE4 || isMinNS6)
    return document.body.scrollLeft;
  return -1;
}

function getPageScrollY() {

  if (isMinNS4)
    return window.pageYOffset;
  if (isMinIE4 || isMinNS6)
    return document.body.scrollTop;
  return -1;
}