Use case :
In case, web Developer controls tizen bar(header/footer) without transitioning other page,
and web Developer use scrollview
Content in page needs to be updated because of scrollable area changed according to content, and changed fixed area need to be hide/show
var $elPage = $( ".ui-page-active" );
$elPage.find( ".ui-header" ).hide();
$elPage.page( "refresh" );
$elPage.find( ".ui-header" ).show();
$elPage.page( "refresh" );
var $elPage = $( ".ui-page-active" );
$elPage.find( ".ui-footer" ).hide();
$elPage.page( "refresh" );
$elPage.find( ".ui-footer" ).show();
$elPage.page( "refresh" );