What am I getting wrong?

EmojiArea.createIcon = function (group, emojiName) { var filename = $.emojiarea.icons[group]['icons'][emojiName]; return '<img class="emoji emoji-" src="data-emoji:../../images/sprites/emoji.png"' + filename + '" alt="' + util.htmlEntities(emojiName) + '">'; };

@brianreavis