var hidden_ids = [];
var included_ids = [];
$(columns_settings).each( function() {
var named_id = $( 'thead th[data-colname="' + this.columnname + '"]', selector ).index( 'th' );
var named_id = $( 'thead th[data-colname="' + this.columnname + '"]', selector ).index( selector+' th' );
var used_id = dt_parameters.bKohaColumnsUseNames ? named_id : id;
if ( used_id == -1 ) return;
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