[Plugin: Reaction Buttons] Reaction buttons causing webpage error in IE8

I wanted to know if someone could take a quick look at my site . Ever since I’ve installed the reaction buttons, I’ve been getting a webpage error in IE8 as the browser.

The webpage details are:

Message: Object required
Line: 53
Char: 3
Code: 0
URI: http://aprama.com

I think this particular code is the problem:

<script type='text/javascript'><!--
function prepare_attr_jl(str) {
return str.replace(/\ /g, "___");
}
function reaction_buttons_increment_button_ajax(post_id, button){
// remove the onclick attribute before sending the request to make
// sure none votes more than once by clicking ten times fast
jQuery("#reaction_buttons_post" + post_id + " span.reaction_button_" + prepare_attr_jl(button) + "_count").removeAttr('onclick');
jQuery.ajax({
type: "post",url: "http://aprama.com/blog_wp/wp-admin/admin-ajax.php", dataType: 'json',
data: { action: 'reaction_buttons_increment_button_php', post_id: post_id, button: button, _ajax_nonce: '3d2b8a4662' },
success: function(data){
if(data['cookie']){
// Set the cookie, which expires after 3 days. Hope that helps to circumvent
// the problem that browsers only have to save 30 cookies per domain.
jQuery.cookie("reaction_buttons_" + post_id, JSON.stringify(data['cookie']), {expires: 3});
}
jQuery("#reaction_buttons_post" + post_id + " span.reaction_button_" + prepare_attr_jl(button) + "_count span").html("("+data['count']+")");
jQuery("#reaction_buttons_post" + post_id + " span.reaction_button_" + prepare_attr_jl(button) + "_count").addClass('voted');
}
});
}
--></script>

I pasted the source code into notepad ++ which is an enhanced version of the one which comes with Windows. I checked carefully and i know it was the reaction buttons causing the issue, voting buttons. The line of the error supplied pointed directly to the reaction buttons.

Thanks

http://wordpress.org/extend/plugins/reaction-buttons/