// -------------------------------------------------------------------
// Image Thumbnail Viewer Script- By Dynamic Drive, available at: http://www.dynamicdrive.com
// Last updated: Jan 22nd, 2007
// -------------------------------------------------------------------

var thumbnailviewer={
  enableTitle: true, //Should "title" attribute of link be used as description?
  enableAnimation: true, //Enable fading animation?
	enableVideo: false,
  defineheader: '<div class="headerbar" onClick="thumbnailviewer.closeit()">CLOSE X</div>', //Define HTML for footer interface
  defineLoading: '<img src="images/loading.gif" /> Loading Image...', //Define HTML for "loading" div

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

  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"

  createthumbBox:function(){
    //write out HTML for Image Thumbnail Viewer plus loading div
    document.write('<div id="thumbBox" onClick="thumbnailviewer.closeit()">'+this.defineheader+'<div id="thumbImageOuter"><div id="thumbImage"></div></div></div>');
    document.write('<div id="thumbLoading">'+this.defineLoading+'</div>');
    this.thumbBox=document.getElementById("thumbBox");
		this.thumbImageOuter=document.getElementById("thumbImageOuter");
    this.thumbImage=document.getElementById("thumbImage"); //Reference div that holds the shown image
    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
    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);
    }
  },


  loadimage:function(link){ //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
    this.enableVideo = false;
		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)
    this.thumbBox.onclick=function(){thumbnailviewer.closeit();}
		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
    }
  },
	
	loadvideo:function(link){ //Load video function that gets attached to each link on the page with rel="thumbnail"
    if(this.thumbBox.style.visibility=="visible") this.closeit(); //Hide it first (not doing so causes triggers some positioning bug in Firefox
    this.enableVideo = true;
		var relattribs = link.getAttribute("rel").split("_");
		var width = relattribs[1]; var height = relattribs[2];
		var path = link.getAttribute("href").split(".");
		var basename = path[0];
		//this.thumbImage.innerHTML = '<img src="images/spacer.gif" width="'+width+'" height="'+height+'" />';

		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=videoHTML; //Populate thumbImage div with shown image's HTML (while still hidden)
    this.thumbBox.onclick=function(){}
    this.thumbLoading.style.visibility="hidden";
		//alert('load_video_1');
		this.showthumbBox(); //Display "thumbbox" div to the world!
		swfobject.embedSWF("mediaplayer.swf", "thumbImage", width, height, "9.0.0", "expressInstall.swf",
											 {file:link.getAttribute("href"), autostart:"true", width:width, height:height},
											 {allowfullscreen: "true"},
											 false);
	  this.centerDiv(this.thumbBox);
		//alert('load_video_2');
  },

  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";
		if(this.enableVideo) {
		  this.thumbImageOuter.innerHTML='<div id="thumbImage"></div>';
		} else {
      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.thumbBox=null;
  },

  dotask:function(target, functionref, tasktype){ //assign a function to execute to an event handler (ie: onunload)
    var tasktype=(window.addEventListener)? tasktype : "on"+tasktype;
    if (target.addEventListener)
      target.addEventListener(tasktype, functionref, false);
    else if (target.attachEvent)
      target.attachEvent(tasktype, functionref);
  },
	
	popup:function(link) {
		thumbnailviewer.stopanimation(); //Stop any currently running fade animation on "thumbbox" div before proceeding
    thumbnailviewer.loadimage(link); //Load image
		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");
    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
          //alert('image_before');
					thumbnailviewer.loadimage(this); //Load image
          //alert('image_after');
					return false;
        }
        this.targetlinks[this.targetlinks.length]=pagelinks[i]; //store reference to target link
      } //end if statement
			if(pagelinks[i].getAttribute("rel") && pagelinks[i].getAttribute("rel").indexOf("video") != -1){ //Begin if statement
        pagelinks[i].onclick=function(){
          thumbnailviewer.stopanimation(); //Stop any currently running fade animation on "thumbbox" div before proceeding
          this.enablenAnimation = false;
					//alert('video_before');
					thumbnailviewer.loadvideo(this); //Load video
          //alert('video_after');
					return false;
        }
        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
    this.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
thumbnailviewer.dotask(window, function(){thumbnailviewer.init()}, "load"); //Initialize script on page load
thumbnailviewer.dotask(window, function(){thumbnailviewer.cleanup()}, "unload");