var isMinNS4 = (navigator.appName.indexOf("Netscape") >= 0 &&
                parseFloat(navigator.appVersion) >= 4) ? 1 : 0;
var isMinIE4 = (document.all) ? 1 : 0;
var isMinIE5 = (isMinIE4 && navigator.appVersion.indexOf("5.")) >= 0 ? 1 : 0;
function hideLayer(layer) {
   	layer.visibility = "hide";
	}

function showLayer(layer) {
    layer.visibility = "show";
	}

function isVisible(layer) {
  if (layer.visibility == "show")
    return(true);
	  return(false);
}
function moveLayerTo(layer, x, y) {
    layer.moveTo(x, y);
	}

function moveLayerBy(layer, dx, dy) {
    layer.moveBy(dx, dy);
	}

function getLeft(layer) {
    return(layer.left);
	  return(-1);
}

function getTop(layer) {
    return(layer.top);
	  return(-1);
}

function getRight(layer) {
    return(layer.left + getWidth(layer));
	  return(-1);
}

function getBottom(layer) {
    return(layer.top + getHeight(layer));
	  return(-1);
}

function getPageLeft(layer) {
    return(layer.pageX);
	  return(-1);
}

function getPageTop(layer) {
    return(layer.pageY);
	  return(-1);
}

function getWidth(layer) {
    if (layer.document.width)
      return(layer.document.width);
    else
      return(layer.clip.right - layer.clip.left);
	  return(-1);
}

function getHeight(layer) {
    if (layer.document.height)
      return(layer.document.height);
    else
      return(layer.clip.bottom - layer.clip.top);
	  return(-1);
}

function getzIndex(layer) {
    return(layer.zIndex);
	  return(-1);
}

function setzIndex(layer, z) {
    layer.zIndex = z;
	}
function clipLayer(layer, clipleft, cliptop, clipright, clipbottom) {
    layer.clip.left   = clipleft;
    layer.clip.top    = cliptop;
    layer.clip.right  = clipright;
    layer.clip.bottom = clipbottom;
	}

function getClipLeft(layer) {
    return(layer.clip.left);
	  return(-1);
}

function getClipTop(layer) {
    return(layer.clip.top);
	  return(-1);
}

function getClipRight(layer) {
    return(layer.clip.right);
	  return(-1);
}

function getClipBottom(layer) {
    return(layer.clip.bottom);
	  return(-1);
}

function getClipWidth(layer) {
    return(layer.clip.width);
	  return(-1);
}

function getClipHeight(layer) {
    return(layer.clip.height);
	  return(-1);
}

function getIEClipValues(str) {
  var clip = new Array();
  var i;
  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);
}
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);
}
function setBgColor(layer, color) {
    layer.bgColor = color;
	}

function setBgImage(layer, src) {
    layer.background.src = src;
	}
function getLayer(name) {
    return findLayer(name, document);
	  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) {
      layer = findLayer(name, layer.document);
      if (layer != null)
        return layer;
    }
  }

  return null;
}
function getWindowWidth() {
    return(window.innerWidth);
	  return(-1);
}

function getWindowHeight() {
    return(window.innerHeight);
	  return(-1);
}

function getPageWidth() {
    return(document.width);
	  return(-1);
}

function getPageHeight() {
    return(document.height);
	  return(-1);
}

function getPageScrollX() {
    return(window.pageXOffset);
	  return(-1);
}

function getPageScrollY() {
    return(window.pageYOffset);
	  return(-1);
}