AddThis button will not work inside AJAX, but will work normally

I recently ran in to issues with using AddThis on an all AJAX site and was able to come up with a couple of solutions for this issue.

It turns out there is a variable that you can pass when loading the AJAX script as well as a way to re-initialize the script if the DOM is reloaded via AJAX. I have posted the full solution in detail on my blog here:

http://joecurlee.com/2010/01/21/how-to-use-addthis-with-ajax-and-overflowauto/

To briefly summarize, the solution is loading AddThis with the variable domready=1 appended, and re-initializing the script by deleting the initial load and then reloading the script dynamically:

var script = 'http://s7.addthis.com/js/250/addthis_widget.js#domready=1';
if (window.addthis){
    window.addthis = null;
}
$.getScript( script );

addthis.toolbox(".addthis_toolbox");

if i understand your question correctly, in the callback of the ajax function, bind the roll-over to the add-this button.

 $.ajax({
   type: "POST",
   url: "some.php",
   data: "name=John&location=Boston",
   success: function(){
     $('.addthis_button').hover(
       function(){
         //do mouse over
       },function(){
         //do mouse out
     });
   }
 });

you can also try

$('.addthis_button').live('mouseover',function(){//do mouseover});
$('.addthis_button').live('mouseout',function(){//do mouseout});

i've never used live, but it seems like it would work for you since your add_this button's get created after the $(document).ready()