dynamic grid tabs

Ihave successfuly created dynamic grid tabs using the code from https://xlinesoft.com/blog/2017/07/11/creating-grid-tabs-dynamically/
Now I would like to hide tab(0)because this tab shows all data and I only want the other "filtered" tabs to be visible. So far I habe tried the following code in the OnLoadevent of the page:
var tabs = pageObj.getTabs();

tabs.hide(0);

but this does not work - tab(0) is still visible.
Please help,

Franz