// never empty.
TagIT.location.push('load');
<!-- load -->
<!-- desktop/DTMFooter-->
<!-- desktop/DoubleClick-->
TagIT.supports.push({'name' : 'DTMFooter', 'enabled' : true});
TagIT.handlesDTMFooter = function () {
return true;
};
var dtmBottomScript = document.createElement('script');
dtmBottomScript.innerHTML = "_satellite.pageBottom()";
document.body.appendChild(dtmBottomScript);
TagIT.supports.push({'name' : 'DoubleClick', 'enabled' : false, 'status' : 'placeholder'});
<!--DoubleClick has unhandled placeholders @@Page-->