Sharing picture in social Networks.

Hi,

In my webpage , i have social networks links when i click that want to share picture into social networks..

Eg:In shopping card if u click  fb link share that picture in fb same like want to do..

this is my code..but i cant share picture into fb,

<div class="addthis_toolbox addthis_default_style ">

<a class="addthis_button_preferred_1"></a>
<a class="addthis_button_preferred_2"></a></div>

 <Script>

var addthis_config = { "data_track_addressbar": true };

</script>

Thanks