// Determine browser.

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;

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


function hideLayer( layer ) 
{
//alert("hide 1=="+isMinNS4);
   if ( isMinNS4 )
   {
   	//alert("hide 2="+layer);
      layer.visibility = "hide";
   }
   if (isMinIE4)
   {
//   	//alert("hide 3="+layer.style);
      layer.style.visibility = "hidden";
      ////alert("pixelLeft="+layer.style.pixelLeft);
   }
//   //alert("hide 4");
}

function showLayer( layer ) {
   if ( isMinNS4 )
      layer.visibility = "show";
   if ( isMinIE4 )
      layer.style.visibility = "visible";
}

/*function isVisible( layer ) {

   if ( isMinNS4 && layer.visibility == "show" )
      return( true );
   if ( isMinIE4 && layer.style.visibility == "visible" )
      return( true );

   return( false );
}*/

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

function moveLayerTo( layer, x, y ) {

   if ( isMinNS4 )
      layer.moveTo( x, y );
   if ( isMinIE4 ) 
   {
//    alert(layer.style.left+"     "+layer.style.top);	
      layer.style.left = x;
      layer.style.top  = y;
   }
}

/*function moveLayerBy( layer, dx, dy ) {

   if ( isMinNS4 )
      layer.moveBy( dx, dy );
   if ( isMinIE4 ) {
      layer.style.pixelLeft += dx;
      layer.style.pixelTop  += dy;
   }
}*/

function getLeft( layer ) 
{
//alert("LEFT 1")	;

   if ( isMinNS4 )
      return( layer.left );
   if ( isMinIE4 )
   {
   	//alert("layer.style="+layer);
      return( layer.style.pixelLeft );
   } 
   return(-1);
}

function getTop( layer ) {
//alert("LEFT 2")	;
   if ( isMinNS4 )
      return(layer.top);
   if ( isMinIE4 )
      return( layer.style.pixelTop );
   return(-1);
}

function getRight( layer ) {
//alert("LEFT 3")	;
   if ( isMinNS4 )
      return( layer.left + getWidth( layer ) );
   if ( isMinIE4 )
      return( layer.style.pixelLeft + getWidth( layer ) );
   return( -1 );
}

function getBottom( layer ) {
//alert("LEFT 4")	;
   if ( isMinNS4 )
      return(layer.top + getHeight(layer));
   else if ( isMinIE4 )
      return( layer.style.pixelTop + getHeight( layer ) );
   return( -1 );
}

function getPageLeft( layer ) {

   if ( isMinNS4 )
      return( layer.pageX );
   if ( isMinIE4 )
      return( layer.offsetLeft );
   return( -1 );
}

function getPageTop( layer ) {

   if ( isMinNS4 )
      return( layer.pageY );
   if ( isMinIE4 )
      return( layer.offsetTop );
   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 ) {
      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 ( false && layer.style.pixelHeight )
         return( layer.style.pixelHeight );
      else
         return( layer.clientHeight );
   }
   return( -1 );
}

/*function getzIndex( layer ) {

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

   return( -1 );
}*/

function setzIndex( layer, z ) {

   if ( isMinNS4 )
      layer.zIndex = z;
   if ( isMinIE4 )
      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 )
      layer.style.clip = 'rect(' + cliptop + ' ' +  clipright + ' ' + clipbottom + ' ' + clipleft +')';
}*/

/*function getClipLeft( layer ) {

   if ( isMinNS4 )
      return( layer.clip.left );
   if ( isMinIE4 ) {
      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 ) {
      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 ) {
      var str =  layer.style.clip;
      if ( !str )
         return(layer.style.pixelWidth);
      var clip = getIEClipValues(layer.style.clip);
      return( clip[1] );
   }
   return( -1 );
}*/

/*function getClipBottom( layer ) {

   if ( isMinNS4 )
      return( layer.clip.bottom );
   if ( isMinIE4 ) {
      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 ) {
      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 getClipHeight( layer ) {

   if ( isMinNS4 )
      return(layer.clip.height);
   if ( isMinIE4 ) {
      var str =  layer.style.clip;
      if ( !str )
         return( layer.style.pixelHeight );
      var clip = getIEClipValues( layer.style.clip );
      return( clip[2] - clip[0] );
   }
   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 );
   alert("CLIP="+clip);
   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 )
      layer.style.backgroundColor = color;
}

/*function setBgImage( layer, src ) {

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

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

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

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

/*function getWindowWidth() {

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

/*function getWindowHeight() {

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

/*function getPageWidth() {

   if ( isMinNS4 )
      return( document.width );
   if ( isMinIE4 )
      return( document.body.scrollWidth );
   return( -1 );
}*/

/*function getPageHeight() {

   if ( isMinNS4 )
      return( document.height );
   if ( isMinIE4 )
      return( document.body.scrollHeight );
   return( -1 );
}*/

/*function getPageScrollX() {

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

/*function getPageScrollY() {

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