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


// 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">CLOSE X</div>', //Define HTML for footer interface


defineLoading: '<img src="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()"><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")