Needed in the widget code to insert "Page ID"
From the documentation of widget:
Must manually insert in this code:ID of the page on your site. Integer 32-bit number. Used in the case, if the same article can be multiple addresses, as well as dynamic websites, which changes only the hash. The default value is the checksum of location.href.
<div id="abcdef"></div>
<script type="text/javascript">
Widgets.abcdef('abcdef', page_ID);
</script>

