gracias parraz, y como quito esos botones? son los que vienen con el blog
---------- Post agregado el 07-ene-2014 hora: 18:45 ----------
elegi unos botones y me da este codigo:
<!-- AddThis Button BEGIN -->
<script type="text/javascript">var addthis_config = {"data_track_addressbar":true};</script>
<script type="text/javascript" src="//s7.addthis.com/js/300/addthis_widget.js#pubid=ra-528a65900b6b8987"></script>
<script type='text/javascript'>
var addthis_product = "blg";
document.doAT = function(cl)
{
        var myclass = new RegExp('hentry');
        var myTitleContainer = new RegExp('post-title');
        var myPostContent = new RegExp('post-footer');
        var elem = this.getElementsByTagName('div');
        for (var i = 0; i < elem.length; i++)
        {
            var classes = elem.className;
            if (myclass.test(classes))
            {
                var container = elem;
                for (var b = 0; b < container.childNodes.length; b++)
                {
                    var item = container.childNodes.className;
                    if (myTitleContainer.test(item))
                    {
                        var link = container.childNodes.getElementsByTagName('a');
                        if (typeof(link[0]) != 'undefined')
                        {
                            var url = link[0].href;
                            var title = link[0].innerHTML;
                        }
                        else
                        {
                            var url = document.url;
                            var title =  container.childNodes.innerHTML;
                        }
                        if (typeof(url) == 'undefined'|| url == 'undefined' ){
                            url = window.location.href;
                        }
                    var singleq = new RegExp("'", 'g');
                    var doubleq = new RegExp('"', 'g');
                    title = title.replace(singleq, ''', 'gi');
                    title = title.replace(doubleq, '"', 'gi');
                    }
                    if (myPostContent.test(item))
                    {
                        var footer = container.childNodes;
                    }
                }
                var n = document.createElement('div');
                var at = "<div class='addthis_toolbox addthis_default_style addthis_32x32_style' addthis:title='"+title+"' addthis:url='"+encodeURI(url)+"'   > <a class='addthis_button_preferred_1'></a> <a class='addthis_button_preferred_2'></a> <a class='addthis_button_preferred_3'></a> <a class='addthis_button_preferred_4'></a> <a class='addthis_button_compact'></a> <a class='addthis_counter addthis_bubble_style'></a> </div> ";
                n.innerHTML = at;
                container.insertBefore(n , footer);
            }
        }
    return true;
};
document.doAT('hentry');
</script>
<!-- AddThis Button END -->
esto lo meto en el body, asi tal cual? o tengo que modificar algo?