$.fn.replaceText = function (search, replace, text_only)
{
    return this.each(function ()
    {
        var node = this.firstChild,
        val,
        new_val,
        remove = [];
        if (node)
        {
            do
            {
                if (node.nodeType === 3)
                {
                    val = node.nodeValue;
                    new_val = val.replace(search, replace);
                    if (new_val !== val)
                    {
                        if (!text_only && /</.test(new_val))
                        {
                            $(node).before(new_val);
                            remove.push(node);
                        } else
                        {
                            node.nodeValue = new_val;
                        }
                    }
                }
            } while (node = node.nextSibling);
        }
        remove.length && $(remove).remove();
    });
};