Navigation Menu

Skip to content

Instantly share code, notes, and snippets.

@roberocity
Created September 25, 2012 00:09
Show Gist options
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
  • Save roberocity/3779214 to your computer and use it in GitHub Desktop.
Save roberocity/3779214 to your computer and use it in GitHub Desktop.
Photo Gallery
function addLoadEvent(func) {
var oldonload = window.onload;
if (typeof window.onload != 'function') {
window.onload = func;
} else {
window.onload = function() {
oldonload();
func();
}
}
}
function insertAfter(newElement,targetElement) {
var parent = targetElement.parentNode;
if (parent.lastChild == targetElement) {
parent.appendChild(newElement);
} else {
parent.insertBefore(newElement,targetElement.nextSibling);
}
}
function preparePlaceholder() {
if (!document.createElement) return false;
if (!document.createTextNode) return false;
if (!document.getElementById) return false;
if (!document.getElementById("imagegallery")) return false;
var placeholder = document.createElement("img");
placeholder.setAttribute("id","placeholder");
placeholder.setAttribute("src","images/placeholder.gif");
placeholder.setAttribute("alt","my image gallery");
var description = document.createElement("p");
description.setAttribute("id","description");
var desctext = document.createTextNode("Choose an image");
description.appendChild(desctext);
var gallery = document.getElementById("imagegallery");
insertAfter(placeholder,gallery);
insertAfter(description,placeholder);
}
function prepareGallery() {
if (!document.getElementsByTagName) return false;
if (!document.getElementById) return false;
if (!document.getElementById("imagegallery")) return false;
var gallery = document.getElementById("imagegallery");
var links = gallery.getElementsByTagName("a");
for ( var i=0; i < links.length; i++) {
links[i].onclick = function() {
return showPic(this);
}
links[i].onkeypress = links[i].onclick;
}
}
function showPic(whichpic) {
if (!document.getElementById("placeholder")) return true;
var source = whichpic.getAttribute("href");
var placeholder = document.getElementById("placeholder");
placeholder.setAttribute("src",source);
if (!document.getElementById("description")) return false;
if (whichpic.getAttribute("title")) {
var text = whichpic.getAttribute("title");
} else {
var text = "";
}
var description = document.getElementById("description");
if (description.firstChild.nodeType == 3) {
description.firstChild.nodeValue = text;
}
return false;
}
addLoadEvent(preparePlaceholder);
addLoadEvent(prepareGallery);
function addLoadEvent(func) {
var oldonload = window.onload;
if (typeof window.onload != 'function') {
window.onload = func;
} else {
window.onload = function(){
oldonload();
func();
}
}
}
function insertAfter (newElement,targetElement) {
var parent = targetElement.parentNode;
if (parent.lastChild == targetElement) {
parent.appendChild(newElement);
} else {
parent.insertBefore(newElement,targetElement.nextSibling);
}
}
function preparePlaceholder () {
if (!document.createElement) return false;
if (!document.createTextNode) return false;
if (!document.getElementById) return false;
if (!document.getElementById("imagegallery")) return false;
var placeholder = document.createElement("img");
placeholder.setAttribute("id", "placeholder");
placeholder.setAttribute("src", "images/placeholder.gif");
placeholder.setAttribute ("alt", "my image gallery");
var description = document.createElement("p");
description.setAttribute("id", "description");
var desctext = document.createTextNode("Choose an image");
description.appendChild(desctext);
var gallery = document.getElementById("imagegallery");
insertAfter(placeholder,gallery);
insertAfter(description,placeholder);
}
function prepareGallery(){
if (!document.getElementsByTagName) return false;
if (!document.getElementById) return false;
if (!document.getElementById("imagegallery")) return false;
var gallery = document.getElementById("imagegallery");
var links = gallery.getElementsByTagName("a");
for (var i=0; i < links.length; i++) {
links[i].onclick = function() {
return showPic(this) ? false : true;
}
}
}
function showPic(whichpic){
if (!document.getElementById("placeholder")) return false;
var source = whichpic.getAttribute("href");
var placeholder = document.getElementById("placeholder");
if (placeholder.nodeName != "IMG") return false;
placeholder.setAttribute("src", source);
if (document.getElementById("description"));{
var text = whichpic.getAttribute("title") ? whichpic.getAttribute("title") : "";
var description = document.getElementById("description");
description.firstChild.nodeValue = text;
}
return true;
}
addLoadEvent(preparePlaceholder);
addLoadEvent(prepareGallery);
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment