showColumn

shows the column that was previously hidden by method 'hideColumn'

void showColumn(id id, [object options,boolean silent] );

id	id	mandatory, the column ID
options	object	optional, an object with showing options
silent	boolean	optional, if true, the datatable is not refreshed

dtable.hideColumn("col1", {span: true});
// show column and its span
dtable.showColumn("col1", {span: true});