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
{
							return true;
						}
					}
				}
			}
		}
		else
		{
			if ( !strEquals( txtName.getText( ), binding.getName( ) ) )
				return true;
			if ( !strEquals( txtDisplayName.getText( ),
					binding.getDisplayName( ) ) )
				return true;
			if ( !strEquals( txtDisplayNameID.getText( ),
					binding.getDisplayNameID( ) ) )
				return true;
			if ( !strEquals( getDataType( ), binding.getDataType( ) ) )
				return true;
			if ( !exprEquals( ExpressionButtonUtil.getExpression( txtExpression ),
					(Expression) binding.getExpressionProperty( ComputedColumn.EXPRESSION_MEMBER )
							.getValue( ) ) )
				return true;
		}
		return false;
	}
	private boolean exprEquals( Expression left, Expression right )
	{
		if ( left == null && right == null )
		{