I am creating a visualforce page, and I would like an action to occur "onchange" of a picklist.

Here is what I have for the visualforce page for the section I am trying to rerender:

<apex:pageBlockSectionItem > <apex:outputLabel value="Stage" /> <apex:selectList value="{!SelectedStage}" size="1"> <apex:selectOptions value="{!StageOptions}" /> <apex:actionSupport reRender="oppForm" event="onchange" status="showCloseoutSection" /> </apex:selectList> </apex:pageBlockSectionItem> <apex:actionStatus startText="(rendering closeout information...)" id="showCloseoutSection"/> </apex:pageBlockSection> <apex:actionRegion > <apex:pageBlockSection title="Closeout Information" rendered="{!Opportunity.StageName == 'Contract Signed'}" id="closeoutBlock" columns="1"> <apex:inputField value="{!Opportunity.Win_Lost_Reason__c}"/> <apex:inputField value="{!Opportunity.Competitor_Lost_To_Or_Replaced__c}"/> <apex:inputField value="{!Opportunity.Price_CT_Prelim__c}"/> </apex:pageBlockSection> </apex:actionRegion>

Here is what I have so far for my controller:

public class OpportunityClosedLost { public Opportunity opp; public apexpages.standardController controller {get; set;} //Used to determine if the action is an insert or update. public Boolean bUpdate{get; set;} public opportunityClosedLost(ApexPages.StandardController stdController) { // constructor controller = stdController; this.opp= (Opportunity)stdController.getRecord(); Opportunity opps = (Opportunity)stdController.getRecord(); opps = [SELECT RecordTypeId, StageName FROM Opportunity WHERE id=:system.currentpageReference().getparameters().get('id')]; //VRC opportunity if(opps.RecordTypeId =='012700000009RIb'){ isVrc = true; } //vRad Alliance Opportunity if(opps.RecordTypeId =='012R00000000M08'){ isAlliance = true; } //EC Opportinity if(opps.RecordTypeId =='012700000005KwS'){ isEc = true; } } public List<SelectOption> getStageOptions(){ List<SelectOption> options = new List<SelectOption>(); options.add(new SelectOption('null','-- Select One --')); Schema.DescribeFieldResult oppStage = Schema.sObjectType.Opportunity.fields.StageName; for (Schema.PickListEntry oppPickVal : oppStage.getPicklistValues()){ // create a selectoption for each pickval options.add(new SelectOption(oppPickVal.getValue(),oppPickVal.getLabel())); } return options; } public Boolean isVrc{ get{ if(isVrc == null){ isVrc = false; } return isVrc; } set; } public Boolean isAlliance{ get{ if(isAlliance == null){ isAlliance = false; } return isAlliance; } set; } public Boolean isEc{ get{ if(isEc == null){ isEc = false; } return isEc; } set; } public String SelectedStage{ get {return SelectedStage;} set; } }

Right now it does not render the pageblocksection that has the <actionRegion> tags around it. Any suggestions as to what I am doing wrong or as to why it is not rendering?  The actionstatus does appear even though nothing is rendered.  I also noticed that when i select an option from the picklist that is suppose control the rendering of the pageblocksection The option does not get saved when save is clicked.

Thanks!