Bug 390669 [Accessibility]Press 'Tab' doesn't focus on the next report item when adding relative period aggregation.
xtab/org.eclipse.birt.report.item.crosstab.ui/src/org/eclipse/birt/report/item/crosstab/internal/ui/dialogs/CrosstabBindingDialogHelper.java
{
					isStatic = false;
					initCalculationTypeCombo( getTimeDimsionName( ) );
				}
				modifyDialogContent( );
				validate( );
			}
		} );
		recentButton.setText( Messages.getString( "CrosstabBindingDialogHelper.recentday.description" ) ); 
		recentButton.setLayoutData( new GridData( GridData.FILL,
				GridData.FILL,
				true,
				false,
				3,
				1 ) );
	}
	private void dateButtonSelection( boolean isStaticDate )
	{
		if ( isStaticDate )
		{
			if ( !isStatic )
			{
				isStatic = true;
				initCalculationTypeCombo( getTimeDimsionName( ) );
			}
		}
		else
		{
			if ( isStatic )
			{