=== added file 'dhis-2/dhis-web/dhis-web-excel-reporting/src/main/java/org/hisp/dhis/reportexcel/export/individual/action/GetPeriodsByPeriodTypeAction.java'
--- dhis-2/dhis-web/dhis-web-excel-reporting/src/main/java/org/hisp/dhis/reportexcel/export/individual/action/GetPeriodsByPeriodTypeAction.java	1970-01-01 00:00:00 +0000
+++ dhis-2/dhis-web/dhis-web-excel-reporting/src/main/java/org/hisp/dhis/reportexcel/export/individual/action/GetPeriodsByPeriodTypeAction.java	2009-10-15 09:50:00 +0000
@@ -0,0 +1,98 @@
+package org.hisp.dhis.reportexcel.export.individual.action;
+
+/*
+ * Copyright (c) 2004-2007, University of Oslo
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ * * Neither the name of the HISP project nor the names of its contributors may
+ *   be used to endorse or promote products derived from this software without
+ *   specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import org.hisp.dhis.period.Period;
+import org.hisp.dhis.period.comparator.PeriodComparator;
+import org.hisp.dhis.reportexcel.export.individual.manager.SelectedStateManager;
+
+import com.opensymphony.xwork2.Action;
+
+/**
+ * @author Nguyen Tran Do Xuan Thuy
+ * @version $Id$
+ * @since 2009-10-14
+ */
+
+public class GetPeriodsByPeriodTypeAction
+    implements Action
+{
+    // -------------------------------------------------------------------------
+    // Dependences
+    // -------------------------------------------------------------------------
+
+    private SelectedStateManager selectedStateManager;
+
+    public void setSelectedStateManager( SelectedStateManager selectedStateManager )
+    {
+        this.selectedStateManager = selectedStateManager;
+    }
+
+    // -------------------------------------------------------------------------
+    // Input & Output
+    // -------------------------------------------------------------------------
+
+    private List<Period> periods;
+
+    public List<Period> getPeriods()
+    {
+        return periods;
+    }
+
+    private String periodTypeName;
+
+    public void setPeriodTypeName( String periodTypeName )
+    {
+        this.periodTypeName = periodTypeName;
+    }
+
+    // -------------------------------------------------------------------------
+    // Implement Action method
+    // -------------------------------------------------------------------------
+
+    public String execute()
+        throws Exception
+    {
+        
+        selectedStateManager.setSelectedPeriodTypeName( periodTypeName );
+     
+        periods = new ArrayList<Period>(selectedStateManager.getPeriodList());
+
+        if ( periods == null )
+        {
+            return ERROR;
+        }
+
+        Collections.sort( periods, new PeriodComparator() );
+        
+        return SUCCESS;
+    }
+}

=== added file 'dhis-2/dhis-web/dhis-web-excel-reporting/src/main/java/org/hisp/dhis/reportexcel/export/individual/action/NextPeriodsAction.java'
--- dhis-2/dhis-web/dhis-web-excel-reporting/src/main/java/org/hisp/dhis/reportexcel/export/individual/action/NextPeriodsAction.java	1970-01-01 00:00:00 +0000
+++ dhis-2/dhis-web/dhis-web-excel-reporting/src/main/java/org/hisp/dhis/reportexcel/export/individual/action/NextPeriodsAction.java	2009-10-15 09:50:00 +0000
@@ -0,0 +1,91 @@
+package org.hisp.dhis.reportexcel.export.individual.action;
+
+/*
+ * Copyright (c) 2004-2007, University of Oslo
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ * * Neither the name of the HISP project nor the names of its contributors may
+ *   be used to endorse or promote products derived from this software without
+ *   specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.hisp.dhis.period.Period;
+import org.hisp.dhis.reportexcel.export.action.SelectionManager;
+import org.hisp.dhis.reportexcel.export.individual.manager.SelectedStateManager;
+
+import com.opensymphony.xwork2.Action;
+
+/**
+ * @author Torgeir Lorange Ostby
+ * @version $Id: NextPeriodsAction.java 2966 2007-03-03 14:38:20Z torgeilo $ *
+ * @modifier Dang Duy Hieu
+ * @since 2009-10-14
+ */
+public class NextPeriodsAction
+    implements Action
+{
+    // -------------------------------------------------------------------------
+    // Dependencies
+    // -------------------------------------------------------------------------
+
+    private SelectionManager selectionManager;
+
+    public void setSelectionManager( SelectionManager selectionManager )
+    {
+        this.selectionManager = selectionManager;
+    }
+
+    private SelectedStateManager selectedStateManager;
+
+    public void setSelectedStateManager( SelectedStateManager selectedStateManager )
+    {
+        this.selectedStateManager = selectedStateManager;
+    }
+
+    // -------------------------------------------------------------------------
+    // Output
+    // -------------------------------------------------------------------------
+
+    private List<Period> periods;
+
+    public List<Period> getPeriods()
+    {
+        return periods;
+    }
+
+    // -------------------------------------------------------------------------
+    // Action implementation
+    // -------------------------------------------------------------------------
+
+    public String execute()
+        throws Exception
+    {
+        selectionManager.setSeletedYear( selectionManager.getSelectedYear() + 1 );
+        selectedStateManager.nextPeriodSpan();
+
+        periods = new ArrayList<Period>( selectedStateManager.getPeriodList() );
+
+        return SUCCESS;
+    }
+}

=== added file 'dhis-2/dhis-web/dhis-web-excel-reporting/src/main/java/org/hisp/dhis/reportexcel/export/individual/action/PreviousPeriodsAction.java'
--- dhis-2/dhis-web/dhis-web-excel-reporting/src/main/java/org/hisp/dhis/reportexcel/export/individual/action/PreviousPeriodsAction.java	1970-01-01 00:00:00 +0000
+++ dhis-2/dhis-web/dhis-web-excel-reporting/src/main/java/org/hisp/dhis/reportexcel/export/individual/action/PreviousPeriodsAction.java	2009-10-15 09:50:00 +0000
@@ -0,0 +1,92 @@
+package org.hisp.dhis.reportexcel.export.individual.action;
+
+/*
+ * Copyright (c) 2004-2007, University of Oslo
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ * * Neither the name of the HISP project nor the names of its contributors may
+ *   be used to endorse or promote products derived from this software without
+ *   specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.hisp.dhis.period.Period;
+import org.hisp.dhis.reportexcel.export.action.SelectionManager;
+import org.hisp.dhis.reportexcel.export.individual.manager.SelectedStateManager;
+
+import com.opensymphony.xwork2.Action;
+
+/**
+ * @author Torgeir Lorange Ostby
+ * @version $Id: PreviousPeriodsAction.java 2966 2007-03-03 14:38:20Z torgeilo $ *
+ * @modifier Dang Duy Hieu
+ * @since 2009-10-14
+ */
+public class PreviousPeriodsAction
+    implements Action
+{
+    // -------------------------------------------------------------------------
+    // Dependencies
+    // -------------------------------------------------------------------------
+
+    private SelectedStateManager selectedStateManager;
+
+    public void setSelectedStateManager( SelectedStateManager selectedStateManager )
+    {
+        this.selectedStateManager = selectedStateManager;
+    }
+
+    private SelectionManager selectionManager;
+
+    public void setSelectionManager( SelectionManager selectionManager )
+    {
+        this.selectionManager = selectionManager;
+    }
+
+    // -------------------------------------------------------------------------
+    // Output
+    // -------------------------------------------------------------------------
+
+    private List<Period> periods;
+
+    public List<Period> getPeriods()
+    {
+        return periods;
+    }
+
+    // -------------------------------------------------------------------------
+    // Action implementation
+    // -------------------------------------------------------------------------
+
+    public String execute()
+        throws Exception
+    {
+        selectionManager.setSeletedYear( selectionManager.getSelectedYear() - 1 );
+        selectedStateManager.previousPeriodSpan();
+
+        periods = new ArrayList<Period>( selectedStateManager.getPeriodList() );
+
+        return SUCCESS;
+    }
+
+}

=== added directory 'dhis-2/dhis-web/dhis-web-excel-reporting/src/main/java/org/hisp/dhis/reportexcel/export/individual/manager'
=== added file 'dhis-2/dhis-web/dhis-web-excel-reporting/src/main/java/org/hisp/dhis/reportexcel/export/individual/manager/DefaultSelectedStateManager.java'
--- dhis-2/dhis-web/dhis-web-excel-reporting/src/main/java/org/hisp/dhis/reportexcel/export/individual/manager/DefaultSelectedStateManager.java	1970-01-01 00:00:00 +0000
+++ dhis-2/dhis-web/dhis-web-excel-reporting/src/main/java/org/hisp/dhis/reportexcel/export/individual/manager/DefaultSelectedStateManager.java	2009-10-15 09:50:00 +0000
@@ -0,0 +1,252 @@
+package org.hisp.dhis.reportexcel.export.individual.manager;
+
+/*
+ * Copyright (c) 2004-2007, University of Oslo
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ * * Neither the name of the HISP project nor the names of its contributors may
+ *   be used to endorse or promote products derived from this software without
+ *   specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Date;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.hisp.dhis.period.CalendarPeriodType;
+import org.hisp.dhis.period.Period;
+import org.hisp.dhis.period.PeriodService;
+import org.hisp.dhis.period.PeriodType;
+import org.hisp.dhis.period.comparator.PeriodComparator;
+import org.hisp.dhis.reportexcel.export.action.SelectionManager;
+import org.hisp.dhis.reportexcel.utils.DateUtils;
+
+import com.opensymphony.xwork2.ActionContext;
+
+/**
+ * @author Torgeir Lorange Ostby
+ * @version $Id: DefaultSelectedStateManager.java 5282 2008-05-28 10:41:06Z
+ *          larshelg $
+ * @modifier Dang Duy Hieu
+ * @since 2009-10-14
+ */
+public class DefaultSelectedStateManager
+    implements SelectedStateManager
+{
+    private static final Log LOG = LogFactory.getLog( DefaultSelectedStateManager.class );
+
+    public static final String SESSION_KEY_SELECTED_PERIOD_TYPE_NAME = "_selected_period_type_name";
+
+    public static final String SESSION_KEY_SELECTED_PERIOD_INDEX = "_selected_period_index";
+
+    public static final String SESSION_KEY_BASE_PERIOD = "_base_period";
+
+    // -------------------------------------------------------------------------
+    // Dependencies
+    // -------------------------------------------------------------------------
+
+    private SelectionManager selectionManager;
+
+    public void setSelectionManager( SelectionManager selectionManager )
+    {
+        this.selectionManager = selectionManager;
+    }
+
+    private PeriodService periodService;
+
+    public void setPeriodService( PeriodService periodService )
+    {
+        this.periodService = periodService;
+    }
+
+    // -------------------------------------------------------------------------
+    // Cache
+    // -------------------------------------------------------------------------
+
+    private ThreadLocal<List<Period>> generatedPeriodsCache = new ThreadLocal<List<Period>>();
+
+    // -------------------------------------------------------------------------
+    // SelectedStateManager implementation
+    // -------------------------------------------------------------------------
+
+    @SuppressWarnings( "unchecked" )
+    public void setSelectedPeriodIndex( Integer index )
+    {
+        getSession().put( SESSION_KEY_SELECTED_PERIOD_INDEX, index );
+    }
+
+    public Integer getSelectedPeriodIndex()
+    {
+        return (Integer) getSession().get( SESSION_KEY_SELECTED_PERIOD_INDEX );
+    }
+
+    @SuppressWarnings( "unchecked" )
+    public void setSelectedPeriodTypeName( String periodTypeName )
+    {
+        getSession().put( SESSION_KEY_SELECTED_PERIOD_TYPE_NAME, periodTypeName );
+    }
+
+    public String getSelectedPeriodTypeName()
+    {
+        return (String) getSession().get( SESSION_KEY_SELECTED_PERIOD_TYPE_NAME );
+    }
+
+    public Period getSelectedPeriod()
+    {
+        Integer index = getSelectedPeriodIndex();
+
+        if ( index == null )
+        {
+            return null;
+        }
+
+        List<Period> periods = getPeriodList();
+
+        if ( index >= 0 && index < periods.size() )
+        {
+            Period selectedPeriod = periods.get( index );
+
+            Period period = null;
+
+            for ( Period p : periodService.getAllPeriods() )
+            {
+                if ( selectedPeriod.equals( p ) )
+                {
+                    period = p;
+
+                    return period;
+                }
+            }
+        }
+
+        return null;
+    }
+
+    public void clearSelectedPeriod()
+    {
+        getSession().remove( SESSION_KEY_SELECTED_PERIOD_INDEX );
+    }
+
+    public List<Period> getPeriodList()
+    {
+        List<Period> periods = generatedPeriodsCache.get();
+
+        Period basePeriod = getBasePeriod();
+
+        if ( periods == null || periods.size() == 0
+            || !periods.get( 0 ).getPeriodType().equals( basePeriod.getPeriodType() ) || !periods.contains( basePeriod ) )
+        {
+            CalendarPeriodType periodType = (CalendarPeriodType) getPeriodType();
+
+            LOG.debug( "Generated periods cache invalid, generating new periods based on " + basePeriod );
+
+            periods = periodType.generatePeriods( basePeriod );
+
+            generatedPeriodsCache.set( periods );
+        }
+
+        Collection<Period> persistedPeriods = periodService.getPeriodsByPeriodType( getPeriodType() );
+
+        // get the period elements which exist in Collection
+        persistedPeriods.retainAll( periods );
+        Collections.sort( (ArrayList<Period>) persistedPeriods, new PeriodComparator() );
+
+        // return periods;
+        return (ArrayList<Period>) persistedPeriods;
+    }
+
+    @SuppressWarnings( "unchecked" )
+    public void nextPeriodSpan()
+    {
+        List<Period> periods = getPeriodList();
+        CalendarPeriodType periodType = (CalendarPeriodType) getPeriodType();
+
+        Period basePeriod = periods.get( periods.size() - 1 );
+        Period newBasePeriod = periodType.getNextPeriod( basePeriod );
+
+        // Future periods not allowed
+        if ( newBasePeriod.getStartDate().before( new Date() ) )
+        {
+            getSession().put( SESSION_KEY_BASE_PERIOD, newBasePeriod );
+        }
+        generatedPeriodsCache.remove();
+
+    }
+
+    @SuppressWarnings( "unchecked" )
+    public void previousPeriodSpan()
+    {
+        List<Period> periods = getPeriodList();
+        CalendarPeriodType periodType = (CalendarPeriodType) getPeriodType();
+
+        Period basePeriod = periods.get( 0 );
+        Period newBasePeriod = periodType.getPreviousPeriod( basePeriod );
+
+        getSession().put( SESSION_KEY_BASE_PERIOD, newBasePeriod );
+
+        generatedPeriodsCache.remove();
+    }
+
+    // -------------------------------------------------------------------------
+    // Support methods
+    // -------------------------------------------------------------------------
+    private PeriodType getPeriodType()
+    {
+        return periodService.getPeriodTypeByName( getSelectedPeriodTypeName() );
+    }
+
+    @SuppressWarnings( "unchecked" )
+    private Period getBasePeriod()
+    {
+        Period basePeriod = (Period) getSession().get( SESSION_KEY_BASE_PERIOD );
+        PeriodType periodType = getPeriodType();
+
+        if ( basePeriod == null )
+        {
+            LOG.debug( "getBasePeriod(): Base period is null, creating new." );
+
+            basePeriod = periodType.createPeriod();
+            getSession().put( SESSION_KEY_BASE_PERIOD, basePeriod );
+
+            selectionManager.setSeletedYear( DateUtils.getCurrentYear() );
+        }
+        else if ( selectionManager.getSelectedYear() > 0 )
+        {
+            Date firstDayOfYear = DateUtils.getFirstDayOfYear( selectionManager.getSelectedYear() );
+
+            basePeriod = periodType.createPeriod( firstDayOfYear );
+        }
+
+        return basePeriod;
+    }
+
+    @SuppressWarnings( "unchecked" )
+    private static final Map getSession()
+    {
+        return ActionContext.getContext().getSession();
+    }
+
+}

=== added file 'dhis-2/dhis-web/dhis-web-excel-reporting/src/main/java/org/hisp/dhis/reportexcel/export/individual/manager/SelectedStateManager.java'
--- dhis-2/dhis-web/dhis-web-excel-reporting/src/main/java/org/hisp/dhis/reportexcel/export/individual/manager/SelectedStateManager.java	1970-01-01 00:00:00 +0000
+++ dhis-2/dhis-web/dhis-web-excel-reporting/src/main/java/org/hisp/dhis/reportexcel/export/individual/manager/SelectedStateManager.java	2009-10-15 09:50:00 +0000
@@ -0,0 +1,59 @@
+package org.hisp.dhis.reportexcel.export.individual.manager;
+
+/*
+ * Copyright (c) 2004-2007, University of Oslo
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ * * Neither the name of the HISP project nor the names of its contributors may
+ *   be used to endorse or promote products derived from this software without
+ *   specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+import java.util.List;
+
+import org.hisp.dhis.period.Period;
+
+/**
+ * @author Torgeir Lorange Ostby
+ * @version $Id: SelectedStateManager.java 3311 2007-05-18 14:08:01Z torgeilo $
+ * @modifier Dang Duy Hieu
+ * @since 2009-10-14
+ */
+public interface SelectedStateManager
+{
+    void setSelectedPeriodIndex( Integer index );
+
+    Integer getSelectedPeriodIndex();
+
+    void setSelectedPeriodTypeName( String periodTypeName );
+    
+    String getSelectedPeriodTypeName();
+    
+    Period getSelectedPeriod();
+
+    void clearSelectedPeriod();
+
+    List<Period> getPeriodList();
+
+    void nextPeriodSpan();
+
+    void previousPeriodSpan();
+}

=== modified file 'dhis-2/dhis-web/dhis-web-excel-reporting/src/main/resources/META-INF/dhis/beans.xml'
--- dhis-2/dhis-web/dhis-web-excel-reporting/src/main/resources/META-INF/dhis/beans.xml	2009-10-09 08:02:34 +0000
+++ dhis-2/dhis-web/dhis-web-excel-reporting/src/main/resources/META-INF/dhis/beans.xml	2009-10-15 09:50:00 +0000
@@ -975,4 +975,42 @@
 	</bean>	
 	-->
 	
+	<!-- Selection State -->
+	
+	<bean id="org.hisp.dhis.reportexcel.export.individual.manager.SelectedStateManager"
+		class="org.hisp.dhis.reportexcel.export.individual.manager.DefaultSelectedStateManager">
+		<property name="periodService"
+			ref="org.hisp.dhis.period.PeriodService"/>
+		<property name="selectionManager"
+			ref="org.hisp.dhis.reportexcel.export.action.SelectionManager"/>
+	</bean>
+	
+	<bean
+		id="org.hisp.dhis.reportexcel.export.individual.action.GetPeriodsByPeriodTypeAction"
+		class="org.hisp.dhis.reportexcel.export.individual.action.GetPeriodsByPeriodTypeAction"
+		scope="prototype">
+		<property name="selectedStateManager" 
+			ref="org.hisp.dhis.reportexcel.export.individual.manager.SelectedStateManager" />
+	</bean>
+	
+	<bean
+		id="org.hisp.dhis.reportexcel.export.individual.action.PreviousPeriodsAction"
+		class="org.hisp.dhis.reportexcel.export.individual.action.PreviousPeriodsAction"
+		scope="prototype">
+		<property name="selectedStateManager" 
+			ref="org.hisp.dhis.reportexcel.export.individual.manager.SelectedStateManager" />
+		<property name="selectionManager"
+			ref="org.hisp.dhis.reportexcel.export.action.SelectionManager"/>
+	</bean>
+	
+	<bean
+		id="org.hisp.dhis.reportexcel.export.individual.action.NextPeriodsAction"
+		class="org.hisp.dhis.reportexcel.export.individual.action.NextPeriodsAction"
+		scope="prototype">
+		<property name="selectedStateManager" 
+			ref="org.hisp.dhis.reportexcel.export.individual.manager.SelectedStateManager" />
+		<property name="selectionManager"
+			ref="org.hisp.dhis.reportexcel.export.action.SelectionManager"/>
+	</bean>
+
 </beans>

=== modified file 'dhis-2/dhis-web/dhis-web-excel-reporting/src/main/resources/struts.xml'
--- dhis-2/dhis-web/dhis-web-excel-reporting/src/main/resources/struts.xml	2009-10-14 04:36:29 +0000
+++ dhis-2/dhis-web/dhis-web-excel-reporting/src/main/resources/struts.xml	2009-10-15 09:50:00 +0000
@@ -744,6 +744,28 @@
 			</result>
 		</action>
 		-->
+				
+		<!-- PROCESSED FOR PERIOD IN INDIVIDUAL REPORT -->
+		
+		<action name="getPeriodsByPeriodType"
+			class="org.hisp.dhis.reportexcel.export.individual.action.GetPeriodsByPeriodTypeAction">
+			<result name="success" type="velocity-xml">
+				/dhis-web-excel-reporting/responsePeriods.vm</result>
+			<result name="error" type="velocity-xml">
+				/dhis-web-excel-reporting/responseError.vm</result>
+		</action>
+		
+		<action name="nextPeriods" 
+			class="org.hisp.dhis.reportexcel.export.individual.action.NextPeriodsAction">
+			<result name="success" type="velocity-xml">
+				/dhis-web-excel-reporting/responsePeriods.vm</result>
+		</action>
+		
+		<action name="previousPeriods" 
+			class="org.hisp.dhis.reportexcel.export.individual.action.PreviousPeriodsAction">
+			<result name="success" type="velocity-xml">
+				/dhis-web-excel-reporting/responsePeriods.vm</result>
+		</action>
 		
 	</package>
 </struts>

=== modified file 'dhis-2/dhis-web/dhis-web-excel-reporting/src/main/webapp/dhis-web-excel-reporting/individualReportExcel.vm'
--- dhis-2/dhis-web/dhis-web-excel-reporting/src/main/webapp/dhis-web-excel-reporting/individualReportExcel.vm	2009-10-14 02:21:43 +0000
+++ dhis-2/dhis-web/dhis-web-excel-reporting/src/main/webapp/dhis-web-excel-reporting/individualReportExcel.vm	2009-10-15 09:50:00 +0000
@@ -108,7 +108,7 @@
       </tr>
 		<tr>
         <td>
-          <select id="availabelPeriodTypes" name="availabelPeriodTypes" style="width:30em ;" onChange="javascript: getPeriods();">
+          <select id="availabelPeriodTypes" name="availabelPeriodTypes" style="width:30em ;" onChange="javascript: getPeriodsByPeriodTypeName();">
             
 			<option value="" ></option>
             #foreach ( $periodType in $periodTypes )
@@ -122,6 +122,11 @@
         <td>&nbsp;</td>
         <td></td>
       </tr>
+      <tr>
+		<td><input name="button_previous" type="button" title="$i18n.getString('earlier_periods')" onClick="javascript: lastPeriod();" value="&lt;&lt;" #if( $periods.size() == 0 ) #end>	      
+		<input name="button_later" type="button" title="$i18n.getString('later_periods')" onclick="javascript: nextPeriod();" value="&gt;&gt;" #if( $periods.size() == 0 ) #end></td>
+		<td>&nbsp;</td>
+	  </tr>
 	  <tr>
         <td>
           <!-- List of all available DataElements -->

=== modified file 'dhis-2/dhis-web/dhis-web-excel-reporting/src/main/webapp/dhis-web-excel-reporting/javascript/individual.js'
--- dhis-2/dhis-web/dhis-web-excel-reporting/src/main/webapp/dhis-web-excel-reporting/javascript/individual.js	2009-10-14 02:39:08 +0000
+++ dhis-2/dhis-web/dhis-web-excel-reporting/src/main/webapp/dhis-web-excel-reporting/javascript/individual.js	2009-10-15 09:50:00 +0000
@@ -296,4 +296,41 @@
 
 function hideToolTip(){
 	byId('tooltip').style.display = 'none';
+}
+
+function getPeriodsByPeriodTypeName() {
+	
+	var request = new Request();
+	request.setResponseTypeXML( 'xmlObject' );
+	request.setCallbackSuccess( responseListPeriodReceived );
+	request.send( 'getPeriodsByPeriodType.action?periodTypeName=' + $("#availabelPeriodTypes").val());
+}
+
+function lastPeriod() {
+
+	var request = new Request();
+	request.setResponseTypeXML( 'xmlObject' );
+	request.setCallbackSuccess( responseListPeriodReceived );
+	request.send( 'previousPeriods.action' ); 
+}
+
+function nextPeriod() {
+
+	var request = new Request();
+	request.setResponseTypeXML( 'xmlObject' );
+	request.setCallbackSuccess( responseListPeriodReceived );
+	request.send( 'nextPeriods.action' ); 
+}
+
+function responseListPeriodReceived( xmlObject ) {
+
+	clearListById('availablePeriods');
+	var list = xmlObject.getElementsByTagName('period');
+	for ( var i = 0; i < list.length; i++ )
+    {
+        item = list[i];  
+        var id = item.getElementsByTagName('id')[0].firstChild.nodeValue;
+        var name = item.getElementsByTagName('name')[0].firstChild.nodeValue;
+		addOption('availablePeriods', name, id);
+    }
 }
\ No newline at end of file