for (var j = elements.length - 1; j >= 0; j--) {
    var element = elements[j];

    if (element.getElement().editAsText) {
        var text = element.getElement().editAsText();
        attrib = element.getElement().getAttributes();
        //index is for offset
        text.deleteText(index.index, index[0].length - 1 + index.index);
        text.insertText(index.index, output).setAttributes(attrib);
        element.getElement().setAttributes(attrib);
    }

}