// -------------------------------------------------------------------

// Image Thumbnail Viewer Script- By Dynamic Drive, available at: http://www.dynamicdrive.com

// Last updated: Jan 22nd, 2007

// -------------------------------------------------------------------



var thumbnailviewer={

enableTitle: true, 

enableAnimation: true, //Enable fading animation?

definefooter: '', //Define HTML for footer interface

defineLoading: '<img src="/gfx/loading.gif" />', //Define HTML for "loading" div



/////////////No need to edit beyond here/////////////////////////


currentImage:-1,
scrollbarwidth: 16,

opacitystring: 'filter:progid:DXImageTransform.Microsoft.alpha(opacity=10); -moz-opacity: 0.1; opacity: 0.1',

targetlinks:[], //Array to hold links with rel="thumbnail"


prevImage:function() {
  
  if(this.currentImage != -1) {
  
    var i = this.currentImage - 1;
    
    if(i < 0)
      i = this.targetlinks.length-1
    
    this.view(i)
    this.currentImage = i;        
  } 
  
},
nextImage:function() {
  
  if(this.currentImage != -1) {
  
    var i = this.currentImage + 1;
    
    if(i >= this.targetlinks.length)
      i = 0
    
    this.view(i)
    this.currentImage = i;        
  } 
  
},



createthumbBox:function(){

//write out HTML for Image Thumbnail Viewer plus loading div

document.write('<div id="thumbBox"><div class="pr"></div>')
document.write('<div id="thumbClose" style="text-align:right;"><a onClick="thumbnailviewer.closeit()"><img src="/gfx/digiobchod/ico/close.png" width="9" height="9" alt="zavřít" /></a></div>')
document.write('<div id="thumbHeader"></div>')  
document.write('<div id="thumbImage"><div id="thumbPrev" onClick="thumbnailviewer.prevImage()"></div>')
document.write('<div id="thumbImageInner" style="'+this.opacitystring+'" onClick="thumbnailviewer.closeit()"></div>')
document.write('<div id="thumbNext" onClick="thumbnailviewer.nextImage()"></div><div class="cleaner"></div></div>')
//<img src="" style="'+this.opacitystring+'" />

if(true) {
  document.write('<div id="thumbThumbnailCount"></div>')
  document.write('<div id="thumbThumbnails"><div style="clear:both"></div></div><div style="clear:both"></div>')
    
  this.thumbThumbnailCount=document.getElementById("thumbThumbnailCount")    
  this.thumbThumbnails=document.getElementById("thumbThumbnails") 
}

document.write(this.definefooter+'</div>')

document.write('<div id="thumbLoading">'+this.defineLoading+'</div>')



this.thumbBox=document.getElementById("thumbBox")
this.thumbHeader=document.getElementById("thumbHeader")
this.thumbImage=document.getElementById("thumbImage") //Reference div that holds the shown image
this.featureImage= document.getElementById("thumbImageInner")
//this.thumbImage.getElementsByTagName("img")[0] //Reference shown image itself

this.thumbLoading=document.getElementById("thumbLoading") //Reference "loading" div that will be shown while image is fetched

this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body //create reference to common "body" across doctypes

},





centerDiv:function(divobj){ //Centers a div element on the page

centerDiv(divobj) 
    /*
var ie=document.all && !window.opera

var dom=document.getElementById

var scroll_top=(ie)? this.standardbody.scrollTop : window.pageYOffset

var scroll_left=(ie)? this.standardbody.scrollLeft : window.pageXOffset

var docwidth=(ie)? this.standardbody.clientWidth : window.innerWidth-this.scrollbarwidth

var docheight=(ie)? this.standardbody.clientHeight: window.innerHeight

var docheightcomplete=(this.standardbody.offsetHeight>this.standardbody.scrollHeight)? this.standardbody.offsetHeight : this.standardbody.scrollHeight //Full scroll height of document

var objwidth=divobj.offsetWidth //width of div element

var objheight=divobj.offsetHeight //height of div element

var topposition=(docheight>objheight)? scroll_top+docheight/2-objheight/2+"px" : scroll_top+10+"px" //Vertical position of div element: Either centered, or if element height larger than viewpoint height, 10px from top of viewpoint

divobj.style.left=docwidth/2-objwidth/2+"px" //Center div element horizontally

divobj.style.top=Math.floor(parseInt(topposition))+"px"

divobj.style.visibility="visible"
    */
},



showthumbBox:function(){ //Show ThumbBox div

this.centerDiv(this.thumbBox)

if (this.enableAnimation){ //If fading animation enabled

this.currentopacity=0.1 //Starting opacity value

this.opacitytimer=setInterval("thumbnailviewer.opacityanimation()", 20)

}

},



getimageid:function(link) {
  var id = 0;
  for(var i=0; i < this.targetlinks.length; i++ ) {

      if(this.targetlinks[i] == link) {
        return i;        
      }          
  }
  return -1;    
},


setFeatureImage:function(ref) {
  
  //this.featureImage.src = ref;
    this.featureImage.style.background = "url(" +ref +") no-repeat center center";
},

loadimage:function(link,id){ //Load image function that gets attached to each link on the page with rel="thumbnail"
  //if (this.thumbBox.style.visibility=="visible") //if thumbox is visible on the page already
    //this.closeit() //Hide it first (not doing so causes triggers some positioning bug in Firefox

  //var imageHTML='<img src="'+link.getAttribute("href")+'" style="'+this.opacitystring+'" />' //Construct HTML for shown image

  //if (this.enableTitle && link.getAttribute("title")) //Use title attr of the link as description?

    //imageHTML+='<br />'+link.getAttribute("title")

    this.centerDiv(this.thumbLoading) //Center and display "loading" div while we set up the image to be shown

   // this.thumbImage.innerHTML=imageHTML //Populate thumbImage div with shown image's HTML (while still hidden)
    
    if (this.enableTitle && link.getAttribute("title")) 
      this.thumbHeader.innerHTML = link.getAttribute("title")
    
    if(id == -1)
      id = this.getimageid(link)
    
    if(id != -1)
      this.thumbThumbnailCount.innerHTML = (id+1) + '/' + this.targetlinks.length;

    this.currentImage = id

    var img = new Image();
    
    img.onload=function()
      { //When target image has completely loaded
        thumbnailviewer.thumbLoading.style.visibility="hidden" //Hide "loading" div
        thumbnailviewer.currentopacity = 0.1
        thumbnailviewer.opacityanimation()        
        thumbnailviewer.setFeatureImage(this.src)              
        thumbnailviewer.showthumbBox() //Display "thumbbox" div to the world!                                  
      }
  
    img.src=link.getAttribute("href")
    if (document.all && !window.createPopup) //Target IE5.0 browsers only. Address IE image cache not firing onload bug: panoramio.com/blog/onload-event/  
      img.src=link.getAttribute("href")
  
    img.onerror=function()
    { //If an error has occurred while loading the image to show
      thumbnailviewer.thumbLoading.style.visibility="hidden" //Hide "loading" div, game over
    }

    /*this.featureImage=this.thumbImage.getElementsByTagName("img")[0] //Reference shown image itself

    this.featureImage.onload=function()
      { //When target image has completely loaded
        thumbnailviewer.thumbLoading.style.visibility="hidden" //Hide "loading" div
        thumbnailviewer.showthumbBox() //Display "thumbbox" div to the world!
      }

  if (document.all && !window.createPopup) //Target IE5.0 browsers only. Address IE image cache not firing onload bug: panoramio.com/blog/onload-event/

  this.featureImage.src=link.getAttribute("href")

  this.featureImage.onerror=function()
  { //If an error has occurred while loading the image to show
    thumbnailviewer.thumbLoading.style.visibility="hidden" //Hide "loading" div, game over
  }*/
},



setimgopacity:function(value){ //Sets the opacity of "thumbimage" div per the passed in value setting (0 to 1 and in between)

var targetobject=this.featureImage

if (targetobject.filters && targetobject.filters[0]){ //IE syntax

if (typeof targetobject.filters[0].opacity=="number") //IE6

targetobject.filters[0].opacity=value*100

else //IE 5.5

targetobject.style.filter="alpha(opacity="+value*100+")"

}

else if (typeof targetobject.style.MozOpacity!="undefined") //Old Mozilla syntax

targetobject.style.MozOpacity=value

else if (typeof targetobject.style.opacity!="undefined") //Standard opacity syntax

targetobject.style.opacity=value

else //Non of the above, stop opacity animation

this.stopanimation()

},



opacityanimation:function(){ //Gradually increase opacity function

this.setimgopacity(this.currentopacity)

this.currentopacity+=0.1

if (this.currentopacity>1)

this.stopanimation()

},



stopanimation:function(){

if (typeof this.opacitytimer!="undefined")

clearInterval(this.opacitytimer)

},





closeit:function(){ //Close "thumbbox" div function

this.stopanimation()

this.thumbBox.style.visibility="hidden"

//this.thumbImage.innerHTML=""

this.thumbBox.style.left="-2000px"

this.thumbBox.style.top="-2000px"

},



cleanup:function(){ //Clean up routine on page unload

this.thumbLoading=null

if (this.featureImage) this.featureImage.onload=null

this.featureImage=null

this.thumbImage=null

for (var i=0; i<this.targetlinks.length; i++)

this.targetlinks[i].onclick=null
this.thumbThumbnails.innerHTML=''

this.thumbBox=null

},



view:function(id) {
thumbnailviewer.stopanimation() //Stop any currently running fade animation on "thumbbox" div before proceeding

//showHide('thb'+this.currentImage)
var o1 = gOI('thb'+this.currentImage)
var o2 = gOI('thb'+id)
if(o2) {if(o1)o1.style.borderColor = o2.style.borderColor; o2.style.borderColor="#131313"}
thumbnailviewer.loadimage(this.targetlinks[id],id) //Load image
//showHide('thb'+id)


return false
},

init:function(){ //Initialize thumbnail viewer script by scanning page and attaching appropriate function to links with rel="thumbnail"

if (!this.enableAnimation)

this.opacitystring=""

var pagelinks=document.getElementsByTagName("a")
var cssClass = ''
for (var i=0; i<pagelinks.length; i++){ //BEGIN FOR LOOP

if (pagelinks[i].getAttribute("rel") && pagelinks[i].getAttribute("rel")=="thumbnail"){ //Begin if statement

pagelinks[i].onclick=function(){

  thumbnailviewer.stopanimation() //Stop any currently running fade animation on "thumbbox" div before proceeding
  thumbnailviewer.view(thumbnailviewer.getimageid(this))
/*thumbnailviewer.loadimage(this,-1)*/ //Load image
return false
}

cssClass = ''
if(((this.targetlinks.length+1) % 7) == 0) {
	
	cssClass = 'last'
}
	
this.thumbThumbnails.innerHTML += '<a href="#" id="thb'+this.targetlinks.length+'" class="'+cssClass+'" onClick="return thumbnailviewer.view('+this.targetlinks.length+')">' + pagelinks[i].innerHTML + '</a>'
this.targetlinks[this.targetlinks.length]=pagelinks[i] //store reference to target link

} //end if statement

} //END FOR LOOP

//Reposition "thumbbox" div when page is resized

dotask(window, function(){if (thumbnailviewer.thumbBox.style.visibility=="visible") thumbnailviewer.centerDiv(thumbnailviewer.thumbBox)}, "resize")

} //END init() function

}



thumbnailviewer.createthumbBox() //Output HTML for the image thumbnail viewer

dotask(window, function(){thumbnailviewer.init()}, "load") //Initialize script on page load

dotask(window, function(){thumbnailviewer.cleanup()}, "unload")