var def_layer="2.4";		// layer.js version

var saveInnerWidth;
var saveInnerHeight;

function set()
{
  if( !window.saveInnerWidth )
  {
    saveInnerWidth = window.innerWidth;
    saveInnerHeight = window.innerHeight;
  }
}

function getpagescrollx()
{
  if( window.pageXOffset )
  {
    return window.pageXOffset;
  }

  if( document.body && document.body.scrollLeft )
  {
    return document.body.scrollLeft;
  }

  if( document.documentElement && document.documentElement.scrollLeft )
  {
    return document.documentElement.scrollLeft;
  }

  return -1;
}

function getpagescrolly()
{
  if( window.pageYOffset )
  {
    return window.pageYOffset;
  }

  if( document.body && document.body.scrollTop )
  {
    return document.body.scrollTop;
  }

  if( document.documentElement && document.documentElement.scrollTop )
  {
    return document.documentElement.scrollTop;
  }

  return( -1 );
}

function hidelayer( layername )
{
  var elt = getElt( layername );

  if( elt != null )
  {
    if( elt.visibility )
    {
      elt.visibility = "hidden";
    }
    else
    {
      elt.style.visibility = "hidden";
    }

    return( 1 );
  }

  return( -1 );
}

function showlayer( layername )
{
  var elt = getElt( layername );

  if( elt != null )
  {
    if( elt.visibility )
    {
      elt.visibility = "visible";
    }
    else
    {
      elt.style.visibility = "visible";
    }

    return( 1 );
  }

  return( -1 );
}

function getfade( layername )
{
  var elt = getElt( layername );

  if( elt != null )
  {
    if( typeof( elt.style.filter ) != "undefined" )
    {
      if( elt.style.filter.toLowerCase().indexOf( "alpha" ) != -1 )
      {
        return parseInt( elt.style.filter.substring( elt.style.filter.indexOf( "=" ) + 1, elt.style.filter.length ), 10 );
      }
    }
    else if( typeof( elt.style.MozOpacity ) != "undefined" )
    {
      return elt.style.MozOpacity * 100;
    }
    else if( typeof( elt.style.opacity ) != "undefined" )
    {
      return elt.style.opacity * 100;
    }
  }

  return( -1 );
}

function setfade( layername, fade )
{
  var elt = getElt( layername );

  if( elt != null && typeof( elt.style ) != "undefined" )
  {
    if( typeof( elt.style.filter ) != "undefined" )
    {
      elt.style.filter = "alpha(Opacity=" + fade+ " )";
    }
    else if( typeof( elt.style.opacity ) != "undefined" )
    {
      elt.style.opacity = fade / 100;
    }
    else if( typeof( elt.style.MozOpacity ) != "undefined" )
    {
      elt.style.MozOpacity = fade / 100;
    }
  }

  return( -1 );
}

function setstatic( layername )
{
  if( document.all && navigator.appVersion >= 5.5 && navigator.appVersion < 6)
  {
    setposition( layername, "static" );
  }
}

function setposition( layername, position )
{
  var elt = getElt( layername );

  if( elt != null )
  {
    if( typeof( elt.style ) != "undefined" && typeof( elt.style.position ) != "undefined" )
    {
      elt.style.position = position;
    }
    else if( typeof( elt.position ) != "undefined" )
    {
      elt.style.position = position;
    }
  }
}

function movelayer( layername, xco, yco )
{
  var elt = getElt( layername );

  if( elt != null )
  {
    if( typeof( elt.left ) != "undefined" )
    {
      elt.left = stringToNumber( xco );
      elt.top  = stringToNumber( yco );
    }
    else
    {
      elt.style.left = stringToNumber( xco ) + "px";
      elt.style.top  = stringToNumber( yco ) + "px";
    }

    return( 1 );
  }

  return( -1 );
}

function sizelayer( layername, wdim, hdim )
{
  var elt = getElt( layername );

  if( elt != null )
  {
    if( typeof( elt.width ) != "undefined" )
    {
      elt.width  = stringToNumber( wdim );
      elt.height = stringToNumber( hdim );
    }
    else
    {
      elt.style.width  = stringToNumber( wdim ) + "px";
      elt.style.height = stringToNumber( hdim ) + "px";
    }

    return( 1 );
  }

  return( -1 );
}

function cliplayer( layername, left, right, top, bottom )
{
  var elt = getElt( layername );

  if( elt != null )
  {
    if( elt.clip )
    {
      elt.clip.left   = left;
      elt.clip.top    = top;
      elt.clip.right  = right;
      elt.clip.bottom = bottom;
    }
    else
    {
      elt.style.clip = 'rect(' + top + ' ' + right + ' ' + bottom + ' ' + left +')';
    }

    return( 1 );
  }

  return( -1 );
}

function getwindowwidth()
{
  if( window.innerWidth )
  {
    return window.innerWidth;
  }

  if( document.documentElement.clientWidth )
  {
    return document.documentElement.clientWidth;
  }

  if( document.body && document.body.clientWidth )
  {
    return document.body.clientWidth;
  }

  return( 0 );
}

function getwindowheight()
{
  if( window.innerHeight )
  {
    return window.innerHeight;
  }

  if( document.documentElement && document.documentElement.clientHeight )
  {
    return document.documentElement.clientHeight;
  }

  if( document.body && document.body.clientHeight )
  {
    return document.body.clientHeight;
  }

  return( 0 );
}

function getpagewidth()
{
  if( document.body && document.body.scrollWidth )
  {
    return( document.body.scrollWidth );
  }

  return getwindowwidth();

  return( 0 );
}

function getpageheight()
{
  if( document.body && document.body.scrollHeight )
  {
    return( document.body.scrollHeight );
  }

  return getwindowwidth();

  return( 0 );
}

function getlayerleft( layername )
{
  var elt = getElt( layername );

  if( elt != null )
  {
    if( elt.pageX )
    {
      return elt.pageX;
    }

    var x = 0;

    while( elt.offsetParent != null )
    {
      x += elt.offsetLeft;
      elt = elt.offsetParent;
    }

    x += elt.offsetLeft;

    return x;
  }

  return( -1 );
}

function getlayertop( layername )
{
  var elt = getElt( layername );

  if( elt != null )
  {
    if( elt.pageY )
    {
      return elt.pageY;
    }

    var y = 0;

    while( elt.offsetParent != null )
    {
      y += elt.offsetTop;
      elt = elt.offsetParent;
    }

    y += elt.offsetTop;

    return y;
  }

  return( -1 );
}

function getlayerwidth( layername )
{
  var elt = getElt( layername );

  if( elt != null )
  {
    if( elt.style && elt.style.pixelWidth )
    {
      return elt.style.pixelWidth;
    }

    if( elt.style && elt.style.width )
    {
      return stringToNumber(elt.style.width);
    }

    if( elt.offsetWidth )
    {
      return stringToNumber( elt.offsetWidth );
    }

    if( elt.document && elt.document.width )
    {
      return elt.document.width;
    }

    if( elt.clip )
    {
      return elt.clip.right - elt.clip.left;
    }
  }

  return( 0 );
}

function getlayerheight( layername )
{
  var elt = getElt( layername );

  if( elt != null )
  {
    if( elt.style && elt.style.pixelHeight )
    {
      return elt.style.pixelHeight;
    }

    if( elt.style && elt.style.height )
    {
      return stringToNumber( elt.style.height );
    }

    if( elt.offsetHeight )
    {
      return stringToNumber( elt.offsetHeight );
    }

    if( elt.document && elt.document.height )
    {
      return elt.document.height;
    }

    if( elt.clip )
    {
      return elt.clip.bottom - elt.clip.top;
    }
  }

  return( 0 );
}

function parseDomClip( layername )
{
  var elt = getElt( layername );
  var str = elt.style.clip;

  var i = str.indexOf( "(" );
  var topr = parseInt( str.substring( i + 1, str.length ), 10 );

  i = str.indexOf( " ", i + 1 );
  var rightr = parseInt( str.substring( i + 1, str.length ), 10 );

  i = str.indexOf( " ", i + 1 );
  var bottomr = parseInt( str.substring( i + 1, str.length ), 10 );

  i = str.indexOf( " ", i + 1 );
  var leftr = parseInt( str.substring( i + 1, str.length ), 10 );

  return new Array( topr, rightr, bottomr, leftr );
}

function getclipleft( layername )
{
  var elt = getElt( layername );

  if( elt != null )
  {
    if( elt.clip )
    {
      return( elt.clip.left );
    }

    if( elt.style )
    {
      clip = parseDomClip( layername );

      return( clip[3] );
    }
  }

  return( -1 );
}

function getclipright( layername )
{
  var elt = getElt( layername );

  if( elt != null )
  {
    if( elt.clip )
    {
      return( elt.clip.left );
    }

    if( elt.style )
    {
      clip = parseDomClip( layername );

      return( clip[1] );
    }
  }

  return( -1 );
}

function getcliptop( layername )
{
  var elt = getElt( layername );

  if( elt != null )
  {
    if( elt.clip )
    {
      return( elt.clip.left );
    }

    if( elt.style )
    {
      clip = parseDomClip( layername );

      return( clip[0] );
    }
  }

  return( -1 );
}

function getclipbottom( layername )
{
  var elt = getElt( layername );

  if( elt != null )
  {
    if( elt.clip )
    {
      return( elt.clip.left );
    }

    if( elt.style )
    {
      clip = parseDomClip( layername );

      return( clip[2] );
    }
  }

  return( -1 );
}

function catchheight( layername )
{
  if( document.layers )
  {
    var elt = getElt( layername );

    if( elt != null )
    {
      elt.height=elt.clip.height;
      elt.width=elt.clip.width;
    }
  }
}

function unBackLayer( theLayer )
{
  if( document.all )
  {
    var iframeId = theLayer.id + "Iframe";

    var theIframe = getElt( iframeId );

    if( theIframe != null )
    {
      theIframe.style.display = "none";
    }
  }
}

function backLayer( theLayer )
{
  if( document.all )
  {
    var iframeId = theLayer.id + "Iframe";

    var theIframe = getElt( iframeId );

    if( theIframe == null )
    {
      theIframe = document.createElement( "iframe" );
      theIframe.setAttribute( "id",          iframeId );
      theIframe.setAttribute( "src",         "/blank.html" );
      theIframe.setAttribute( "frameBorder", "0" );
      theIframe.setAttribute( "scrolling",   "no" );

      theIframe.style.position = "absolute";
      theIframe.style.zIndex   = Math.max( theLayer.style.zIndex - 1, 1 );
      theIframe.style.filter   = "alpha(Opacity=0)";

      document.body.appendChild( theIframe );
    }

    theIframe.style.width   = ( theLayer.clientWidth  + 2 ) + "px";
    theIframe.style.height  = ( theLayer.clientHeight + 2 ) + "px";
    theIframe.style.top     = theLayer.style.top;
    theIframe.style.left    = theLayer.style.left;
    theIframe.style.display = "";
  }
}

function getlayerstyle( layername )
{
  var elt = getElt( layername );

  if( typeof( document.defaultView ) != "undefined" )
  {
    return document.defaultView.getComputedStyle( elt, null )
  }

  if( typeof( elt.currentStyle ) != "undefined" )
  {
    return elt.currentStyle;
  }

  return null;
}

function getElt()
{
  if( getElt.arguments.length == 1 && typeof(getElt.arguments[0]) == "object" ) // layer passed in, so simply return it GE:17/May/07
  {
    return getElt.arguments[0];
  }

  if( document.layers )
  {
    var currentLayer = document.layers[getElt.arguments[0]];

    for( var i = 1 ; i < getElt.arguments.length && currentLayer ; i++ )
    {
      currentLayer = currentLayer.document.layers[getElt.arguments[i]];
    }

    return currentLayer;
  }
  else if( document.getElementById && document.getElementsByName )
  {
    var eltName = getElt.arguments[getElt.arguments.length - 1];

    if( document.getElementById( eltName ) )		// First try to find by id
    {
      return document.getElementById( eltName );
    }
    else if( document.getElementsByName( eltName ) )	// Then if that fails by name
    {
      return document.getElementsByName( eltName )[0];
    }
  }
  else if( document.all )
  {
    var elt = document.all[getElt.arguments[getElt.arguments.length - 1]];

    return( elt );
  }

  return null;
}

function stringToNumber( s )
{
  return parseInt( ( '0' + s ), 10 )
}