How to install the VKontakte widget (Publication of links)?

Question

PHP

Hello!
Please tell me how to install the VKontakte widget (Publication of links).
Website on Joomla 1.5
You need to insert a widget into site.ru/blog, naturally in this section the news/article announcement, and after read more I put the widget code, as a result I click on the ready-made widget button on the site and the site.ru/blog page link is published, not this news/article.
How to install correctly or need to add some parameter, please tell me!

Answer 1

the widget has a url field. on each page in this field there should be a link of this page

<!-- Put this script tag to the place, where the Share button will be -->
<script type="text/javascript"><!--
document.write(VK.Share.button({url: "http://site.ru"},{type: "round", text: "Сохранить"}));
--></script>

instead of site.ru