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



// 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?



definefooter: '<div class="footerbar">Fermer X</div>', //Define HTML for footer interface



defineLoading: '<img src="images/loading.gif" /> Chargement de l\'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()"><div id="thumbImage"></div>'+this.definefooter+'</div>')



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



this.thumbBox=document.getElementById("thumbBox")



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



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.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.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)



},







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



thumbnailviewer.loadimage(this) //Load image



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")