/*************************************************\
| LAYERS MANIPULATION FUNCTIONS SET. V 2.5        |
| For Internet Explorer 4.*,5.*, Netscape 4.*,6.* |
| Mozilla, Opera 5.*                              |
| Copyright by Kruglov S.A. (www.kruglov.ru) 2001 |
\*************************************************/

/***  See for description and latest version:  ***\
\***  http://www.kruglov.ru/klayers/           ***/

// document and window functions:

var KLayers=false
var isDOM
var isNC4
var isNC
var isIE
var isNC6
var isMozilla
var isOpera

var pageLeft
var pageTop
var imagePreloaderCount
var imagePreloaderArray
var imageRef
var styleSwitch
var layerPostfix
var layerRef

// NOTE: getWindowLeft and getWindowTop are based on new browsers features. They may not work in Opera and IE 4

function getWindowLeft(){
  if(isOpera) return -1 // not implemented in Opera
  if(isNC) return top.screenX
  if(isIE) return top.screenLeft
}

function getWindowTop(){
  if(isOpera) return -1 // not implemented in Opera
  if(isNC) return top.screenY
  if(isIE) return top.screenTop
}

function getWindowWidth(w){
  if(!w) w=window
  if(isIE) return w.document.body.clientWidth
  if(isNC) return w.innerWidth
}

function getWindowHeight(w){
  if(!w) w=window
  if(isIE) return w.document.body.clientHeight
  if(isNC) return w.innerHeight
}

function setWindowLeft(x){
  if(!isOpera)top.moveBy(x-getWindowLeft(),0)
}

function setWindowTop(y){
  if(!isOpera)top.moveBy(0,y-getWindowTop())
}

function setWindowWidth(x){
  if(isIE) top.resizeBy(x-getWindowWidth(),0); else
  if(isNC) top.innerWidth=x
}

function setWindowHeight(y){
  if(isIE) top.resizeBy(0,y-getWindowHeight()); else
  if(isNC) top.innerHeight=y
}

function getScrollX(w){
  if(!w) w=window
  if(isIE) return w.document.body.scrollLeft
  if(isNC) return w.pageXOffset
}

function getScrollY(w){
  if(!w) w=window
  if(isIE) return w.document.body.scrollTop
  if(isNC) return w.pageYOffset
}

function getDocumentWidth(w){
  if(!w) w=window
  if(isIE) return w.document.body.scrollWidth
  if(isOpera) return -1 // not implemented in Opera
  if(isNC) return w.document.width
}

function getDocumentHeight(w){
  if(!w) w=window
  if(isIE) return w.document.body.scrollHeight
  if(isOpera) return -1 // not implemented in Opera
  if(isNC) return w.document.height
}

var LAYER=0
var IMAGE=1

function findObject(where, what, type){
  var i,j,l,s
  var len=eval(where+".length")
  for(j=0;j<len;j++){
    s=where+"["+j+"].document.layers"
    if(type==LAYER){
      l=s+"[\""+what+"\"]"
    }
    if(type==IMAGE){
      i=where+"["+j+"].document.images"
      l=i+"[\""+what+"\"]"
    }
    if(eval(l)) return l
    l=findObject(s,what,type)
    if(l!="false") return l
  }
  return "false"
}

function getLayerPath(name,parent){
  var l=((parent && isNC4)?(parent+"."):(""))+layerRef+name+layerPostfix
  if(eval(l))return l
  if(!isNC4){
    return "false"
  }else{
    return findObject("document.layers",name,LAYER)
  }
}

function getImagePath(name,parent){
  var l=((parent && isNC4)?(parent+"."):(""))+imageRef+name+layerPostfix
  if(eval(l))return l
  if(!isNC4){
    return "false"
  }else{
    return findObject("document.layers",name,IMAGE)
  }
}

// class "KLayer":

KLP=KLayer.prototype

KLP.isExist=KL_exists
KLP.getLeft=KL_left
KLP.getTop=KL_top
KLP.getWidth=KL_width
KLP.getHeight=KL_height
KLP.getZIndex=KL_zIndex
KLP.moveX=KL_moveX
KLP.moveY=KL_moveY
KLP.move=KL_move
KLP.moveZ=KL_moveZ
KLP.setZIndex=KL_moveZ
KLP.setVisibility=KL_setVisibility
KLP.show=KL_show
KLP.hide=KL_hide
KLP.isVisible=KL_visible
KLP.setBgColor=KL_setBgColor
KLP.clip=KL_clip
KLP.scroll=KL_scroll
KLP.scrollByOffset=KL_scrollByOffset
KLP.scrollByPercentage=KL_scrollByPercentage
KLP.write=KL_write
KLP.add=KL_add

function KLayer(name,parent){
  this.path=getLayerPath(name,parent)
  this.object=eval(this.path)
  this.css=eval(this.path+styleSwitch)
  this.id=name
}

function layer(name){
  var x=new KLayer(name,false)
  return (x.path)?x:false
}

function layerFrom(name,parent){
  var x=new KLayer(name,layer(parent).path)
  return (x.path)?x:false
}

function KL_exists(){
  return (this.object)?true:false
}

function KL_left(){
  var o=this.object
  if(isStandard) return o.offsetLeft-pageLeft
  if(isNC4) return o.pageX-pageLeft
}

function KL_top(){
  var o=this.object
  if(isStandard) return o.offsetTop-pageTop
  if(isNC4) return o.pageY-pageTop
}

function KL_width(){
  var o=this.object
  if(isOpera) return this.css.pixelWidth
  if(isStandard) return o.offsetWidth
  if(isNC4) return o.document.width
}

function KL_height(){
  var o=this.object
  if(isOpera) return this.css.pixelHeight
  if(isStandard) return o.offsetHeight
  if(isNC4) return o.document.height
}

function KL_zIndex(){
  return this.css.zIndex
}

function KL_moveX(x){
  this.css.left=x+pageLeft
}

function KL_moveY(y){
  this.css.top=y+pageTop
}

function KL_move(x,y){
  this.moveX(x)
  this.moveY(y)
}

function KL_moveZ(z){
  this.css.zIndex=z
}

function KL_setVisibility(v){
  this.css.visibility=(v)?(isNC4?"show":"visible"):(isNC4?"hide":"hidden")
}

function KL_show(){
  this.setVisibility(true)
}

function KL_hide(){
  this.setVisibility(false)
}

function KL_visible(){
  return (this.css.visibility.toLowerCase().indexOf("h")==0)?false:true
}

function KL_setBgColor(color){
  if(isStandard){
  	this.css.backgroundColor=color
  }
  if(isNC4){
  	this.css.bgColor=color
  }
}

function KL_clip(top, right, bottom, left){
  if(isIE || isNC6 || isMozilla){
    this.css.clip="rect("+top+"px "+right+"px "+bottom+"px "+left+"px)"
  }
  if(isNC4 || isOpera){
    this.css.clip.top=top
    this.css.clip.right=right
    this.css.clip.bottom=bottom
    this.css.clip.left=left
  }
}

function KL_scroll(windowLeft,windowTop,windowWidth,windowHeight,scrollX,scrollY){
  if(scrollX<0)scrollX=0
  if(scrollY<0)scrollY=0
  if(scrollX>this.getWidth()-windowWidth) scrollY=this.getWidth()-windowWidth
  if(scrollY>this.getHeight()-windowHeight) scrollY=this.getHeight()-windowHeight
  var top=0
  var right=windowWidth
  var bottom=windowHeight
  var left=0
  left=left+scrollX
  right=right+scrollX
  top=top+scrollY
  bottom=bottom+scrollY
  this.move(windowLeft-scrollX,windowTop-scrollY)
  this.clip(top,right,bottom,left)
}

function KL_scrollByOffset(windowLeft,windowTop,windowWidth,windowHeight,scrollX,scrollY){
  var X=-parseInt(this.css.left)+windowLeft+scrollX
  var Y=-parseInt(this.css.top)+windowTop+scrollY
  this.scroll(windowLeft,windowTop,windowWidth,windowHeight,X,Y)
}

function KL_scrollByPercentage(windowLeft,windowTop,windowWidth,windowHeight,scrollX,scrollY){
  var X=(this.getWidth()-windowWidth)*scrollX/100
  var Y=(this.getHeight()-windowHeight)*scrollY/100
  this.scroll(windowLeft,windowTop,windowWidth,windowHeight,X,Y)
}

function KL_write(str){
  if(isOpera)return // not implemented for Opera
  var o=this.object
  if(isStandard){
    o.innerHTML=str
  }else
  if(isNC4){
    var a=o.document
    a.open()
    a.write(str)
    a.close()
  }
}

function KL_add(str){
  if(isOpera)return // not implemented for Opera
  var o=this.object
  if(isStandard){
    o.innerHTML+=str
  }else
  if(isNC4){
    var a=o.document
    a.write(str)
  }
}

// class "KImage"

KIP=KImage.prototype

KIP.isExist=KI_exists
KIP.getSrc=KI_src
KIP.setSrc=KI_setSrc

function KImage(name){
  this.path=getImagePath(name)
  this.object=eval(this.path)
}

function image(name){
  var x=new KImage(name,false)
  return (x.path)?x:false
}

function imageFrom(name,layerName){
  var x=new KImage(name,layer(layerName).path)
  return (x.path)?x:false
}

function KI_exists(){
  return (this.object)?true:false
}

function KI_src(){
  return this.object.src
}

function KI_setSrc(file){
  this.object.src=file
}

function preloadImage(imageFile){
  imagePreloaderArray[imagePreloaderCount]=new Image()
  imagePreloaderArray[imagePreloaderCount++].src=imageFile
}

// init:

function initKLayers(){
  isDOM=(document.getElementById)?true:false
  isNC4=(document.layers)?true:false
  isIE=(document.all && document.all.item)?true:false
  isOpera=isDOM && window.opera
  isNC6=isDOM && !isIE && !isOpera
  isMozilla=isNC6
  isNC=isNC4 || isNC6 || isMozilla || isOpera
  isStandard=isIE || isNC6 || isMozilla || isOpera
    
  if(!isDOM && !isNC4 && !isNC6 && !isIE && !isOpera && !isMozilla){
    KLayers=false
    return KLayers
  }

  pageLeft=0
  pageTop=0
  imagePreloaderCount=0
  imagePreloaderArray=new Array()

  imageRef="document.images[\""
  styleSwitch=".style"
  layerPostfix="\"]"

  if(isNC4){
    layerRef="document.layers[\""
    styleSwitch=""
  }

  if(isIE){
    layerRef="document.all[\""
  }

  if(isDOM){
    layerRef="document.getElementById(\""
    imageRef=layerRef
    layerPostfix="\")"
  }
  KLayers=true
  return KLayers
}

initKLayers()