if (document.location.protocol == 'http:') {
// -------------------------------------------------------------------
// 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: '', //Define HTML for footer interface
defineLoading: '
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('' + this.definefooter + '
' + this.defineLoading + '
')
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 = '
' //Construct HTML for shown image
if (this.enableTitle && link.getAttribute("title")) //Use title attr of the link as description?
imageHTML += '
' + 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
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")
}