Fix Etsy: Disables ajax uploading on Etsy to make the photo uploader work in Opera 11.

Fix Etsy 1.01.js

// ==UserScript==
// @name Fix Etsy
// @version 1.01
// @description Disables ajax uploading on Etsy to make the photo uploader work in Opera 11.
// @author XP1 (https://github.com/XP1/)
// @namespace https://gist.github.com/1577789/
// @include http*://etsy.com/your/listings/create*
// @include http*://*.etsy.com/your/listings/create*
// ==/UserScript==

/*jslint browser: true, vars: true, white: true, maxerr: 50, indent: 4 */
(function (console, window)
{
    "use strict";

    var userScript = {
        name: "Fix Etsy"
    };

    function removeEventListenerAfterFiring(numberOfTimes, callback)
    {
        var remaining = numberOfTimes;
        return function listener(event)
        {
            remaining -= 1;

            if (remaining <= 0)
            {
                var target = event.target;
                var type = event.type;
                target.removeEventListener(type, listener, false);
                target.removeEventListener(type, listener, true);
            }

            callback();
        };
    }

    var handleException = function handleException(theFunction)
    {
        try
        {
            theFunction();
        }
        catch (exception)
        {
            console.error("[" + userScript.name + "]: Exception: " + exception + "\n\nStack:\n" + exception.stack + "\n\nStacktrace:\n" + exception.stacktrace);
        }
    };

    /**
     * Disables ajax upload because it will not work in Opera 11.
     *
     * Opera 11 does not support XMLHttpRequest 2, which allows sending a file blob as an argument:
     * http://dev.w3.org/2006/webapi/XMLHttpRequest-2/#the-send-method
     */
    function disableAjaxUpload()
    {
        function disable()
        {
            return false;
        }

        var Etsy = window.Etsy;

        handleException(function ()
        {
            Etsy.FileUploader.prototype.supportsAJAX = disable;
        });

        handleException(function ()
        {
            Etsy.YourEtsy.Listings.Photo.Upload.prototype.supportsAJAX = disable;
        });
    }

    window.addEventListener("DOMContentLoaded", removeEventListenerAfterFiring(1, disableAjaxUpload), false);
}(this.console, this));

I posted this user JS in these threads:

Can't upload photos in Opera:
http://my.opera.com/community/forums/topic.dml?id=1057592

Uploading photos using Opera:
http://www.etsy.com/teams/7718/site-help/discuss/8744722/

Browser Opera has problem in uploading pictures by using the New Listing Version:
http://www.etsy.com/teams/7720/bugs/discuss/7646941/

This user JS is no longer necessary. Etsy has updated its codebase to disable the ajax uploader in Opera.