// -------------------------------------------------------------------
// 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
definefooter: '<div class="footerbar" onClick="thumbnailviewer.closeit()">CLOSE X</div>', //Define HTML for footer interface
defineLoading: '<img src="http://www.a-firmative.co.uk/display_system/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"

//write out HTML for Image Thumbnail Viewer plus loading div
createthumbBox:function(){
	//document.write('<div id="thumbBox" onClick="thumbnailviewer.closeit()"><div id="thumbImage"></div>'+this.definefooter+'</div>')
	document.write('<div id="thumbBox"><div id="thumbImage"></div>'+this.definefooter+'</div>')
	document.write('<div id="thumbLoading">'+this.defineLoading+'</div>')

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

	//Reference div that holds the shown image
	this.thumbImage=document.getElementById("thumbImage") 

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

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

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

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

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

	//height of div element
	var objheight=divobj.offsetHeight //Vertical position of div element: Either centered, or if element height larger than viewpoint height, 10px from top of viewpoint

	var topposition=(docheight>objheight)? scroll_top+docheight/2-objheight/2+"px" : scroll_top+10+"px" 

	//Center div element horizontally
	//divobj.style.left=docwidth/2-objwidth/2+"px" 
	//divobj.style.top=Math.floor(parseInt(topposition))+"px"


	divobj.style.left="120px" 
	divobj.style.top="160px"
	divobj.style.visibility="visible"
},

//Show ThumbBox div
showthumbBox:function(){ 
	this.centerDiv(this.thumbBox)

	if (this.enableAnimation){ //If fading animation enabled
		this.currentopacity=0.1 //Starting opacity value
		this.opacitytimer=setInterval("thumbnailviewer.opacityanimation()", 20)
	}
},

//Load image function that gets attached to each link on the page with rel="thumbnail"
loadimage:function(link){ 
	//if thumbox is visible on the page already
	if (this.thumbBox.style.visibility=="visible") 

	//Hide it first (not doing so causes triggers some positioning bug in Firefox
	this.closeit() 

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

	if (link.getAttribute("display"))
	{
		var imgWidth='200'
		var imgHeight='210'
		var NameText = '<u>Name: </u><br>'+link.getAttribute("clientname")+'<br>'
	}
	else
	{
		var imgWidth='520'
		var imgHeight='200'
		var NameText = link.getAttribute("clientname")
	}

	
	var imageHTML='<table class="default" width="520" height="210">'
	//imageHTML=imageHTML+'<tr><td rowspan="3"><img src="'+link.getAttribute("href")+'" style="'+this.opacitystring+'" width="'+imgWidth+'" height="'+imgHeight+'"/></td>'
	
	//Create text string with comments
	//imageHTML=imageHTML+'<td width="5"></td><td width="320" valign="top">'+NameText

	//** RB: page specific elements (using display and comments bespoke tags)
	if (link.getAttribute("display"))
		{
		imageHTML=imageHTML+'<tr><td rowspan="3"><img src="'+link.getAttribute("href")+'" style="'+this.opacitystring+'" width="'+imgWidth+'" height="'+imgHeight+'"/></td>'
		imageHTML=imageHTML+'<td width="5"></td><td width="320" valign="top">'+NameText
		imageHTML=imageHTML+'<u>'+link.getAttribute("display")+':</u><br>';
		imageHTML=imageHTML+link.getAttribute("comments")+'</td></tr>'
		}
	else
	{
		imageHTML=imageHTML+'<tr><td bgcolor="#54a1db"><font color="#ffffff">'+NameText+'</font></td></tr>'
		imageHTML=imageHTML+'<tr><td width="320"><img src="'+link.getAttribute("href")+'" style="'+this.opacitystring+'" width="'+imgWidth+'" height="'+imgHeight+'"/></td></tr>'
		//imageHTML=imageHTML+'<td width="5"></td><td width="320" valign="top">'
		//var imageHTML=imageHTML+'</td></tr>'
	}

	imageHTML=imageHTML+'</table>'

        //var clientName='Name: '+link.getAttribute("clientname")

	//Use title attr of the link as description?
	if (this.enableTitle && link.getAttribute("title")) 
		imageHTML+='<br />'+link.getAttribute("title")

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

	//Populate thumbImage div with shown image's HTML (while still hidden)
	this.thumbImage.innerHTML=imageHTML 

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

	//When target image has completely loaded
	this.featureImage.onload=function(){ 

		//Hide "loading" div
		thumbnailviewer.thumbLoading.style.visibility="hidden" 

		//Display "thumbbox" div to the world!
		thumbnailviewer.showthumbBox() 
		}

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

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

	//If an error has occurred while loading the image to show
	this.featureImage.onerror=function(){ 

		//Hide "loading" div, game over
		thumbnailviewer.thumbLoading.style.visibility="hidden" 
		}
	},

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

	var targetobject=this.featureImage

	//IE syntax
	if (targetobject.filters && targetobject.filters[0])
		{ 
		//IE6
		if (typeof targetobject.filters[0].opacity=="number") 
			targetobject.filters[0].opacity=value*100
		else 
			//IE 5.5
			targetobject.style.filter="alpha(opacity="+value*100+")"
		}

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

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

		//Non of the above, stop opacity animation
		else 
			this.stopanimation()
		},

//Gradually increase opacity function
opacityanimation: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)
	},

//Close "thumbbox" div function
closeit:function(){ 
	this.stopanimation()
	this.thumbBox.style.visibility="hidden"
	this.thumbImage.innerHTML=""
	this.thumbBox.style.left="-2000px"
	this.thumbBox.style.top="-2000px"
	},

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

//assign a function to execute to an event handler (ie: onunload)
dotask:function(target, functionref, tasktype){ 
	var tasktype=(window.addEventListener)? tasktype : "on"+tasktype
	if (target.addEventListener)
		target.addEventListener(tasktype, functionref, false)
	else if (target.attachEvent)
		target.attachEvent(tasktype, functionref)
	},

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