// -------------------------------------------------------------------
// Image Thumbnail Viewer Script- By Dynamic Drive, available at: http://www.dynamicdrive.com
// Last updated: July 7th, 2008- Fixed enlarged image not showing in IE sometimes
// -------------------------------------------------------------------

var thumbnailviewer={
	enableTitle : true, // Should "title" attribute of link be used as
						// description?
	enableAnimation : true, // Enable fading animation?
	definefooter : '<div class="footerbar">X</div>', // Define HTML for
														// footer interface
	defineLoading : '<img src="/dguadalajara-theme/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()"><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
		thumbnailviewer.thumbLoading.style.visibility = "hidden" // Hide
																	// "loading"
																	// 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?
			var pieFoto = link.getAttribute("title");
			if (pieFoto == 'null'){
				pieFoto = '';
			}
			imageHTML += '<div id="pieFoto">' + pieFoto+ '</div>'
		}
		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
		if (this.featureImage.complete)
			thumbnailviewer.showthumbBox()
		else {
			this.featureImage.onload = function() { // When target image has
													// completely loaded
				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")