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

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

function inheritLayer(layer) {
  if(isMinNS4)layer.visibility="inherit";
  if(isMinIE4)layer.style.visibility="inherit";
}

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

function moveLayerTo(layer,x,y) {
  if(isMinNS4)
    layer.moveTo(x,y);
  if(isMinIE4) {
    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) {
  if(isMinNS4)
    return layer.left;
  if(isMinIE4)
    return layer.style.pixelLeft;
  return -1;
}

function getTop(layer) {
  if(isMinNS4)
    return layer.top;
  if(isMinIE4)
    return layer.style.pixelTop;
  return -1;
}

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

function getBottom(layer) {
  if(isMinNS4)
    return layer.top+getHeight(layer);
  if(isMinIE4)
    return layer.style.pixelTop+getHeight(layer);
  return -1;
}

function getPageLeft(layer) {
  var x;
  if(isMinNS4)
    return layer.pageX;
  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(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) {
    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;
  }
  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;
}

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;
  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) {
  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+")";
}

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

function getImage(name) {
  if(isMinNS4)
    return findImage(name,document);
  if(isMinIE4)
    return eval('document.all.'+name);
  return null;
}

function findImage(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=findImage(name,doc.layers[i].document))!=null) {
      img.container=doc.layers[i];
      return img;
    }
  return null;
}

function getImagePageLeft(img) {
  var x,obj;
  if(isMinNS4) {
    if(img.container!=null)
      return img.container.pageX+img.x;
    else
      return img.x;
  }
  if(isMinIE4) {
    x=0;
    obj=img;
    while(obj.offsetParent!=null) {
      x+=obj.offsetLeft;
      obj=obj.offsetParent;
    }
    x+=obj.offsetLeft;
    return x;
  }
  return -1;
}

function getImagePageTop(img) {
  var y,obj;
  if(isMinNS4) {
    if(img.container!=null)
      return img.container.pageY+img.y;
    else
      return img.y;
  }
  if(isMinIE4) {
    y=0;
    obj=img;
    while(obj.offsetParent!=null) {
      y+=obj.offsetTop;
      obj=obj.offsetParent;
    }
    y+=obj.offsetTop;
    return y;
  }
  return -1;
}

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;
}