Hi All,

I want the selected picklist value along with there domain(using <apex:param>) displayed in the below <apex:pageBlockSection> Title. I have two  picklist ,As I select the value from another picklist the previous count value and domain both must be updated. But In my case count value for the first picklist value displayed null, but the last picklist slected value in displayed fine. I didnt understand its behavior. I am sending VisualForce Page and Controller.. Please give the solution
soon please..
Thanks in advance.

VisualForce Page:
<apex:page controller="Custom_Picklist" tabStyle="Contact">
    <apex:form >
        <apex:pageBlock >
            <h1>Salesforce</h1>
            <apex:selectList size="1" value="{!count}">
                                <apex:selectOptions value="{!numberOfQuestions }"/>
                                    <apex:actionSupport event="onchange" action="{!showQuestions}" reRender="abcd">
                                        <apex:param name="Domain" value="Salesforce" assignTo="{!Domain}" />
                                    </apex:actionSupport>
                             </apex:selectList>
                             
              <h1>PHP</h1>
            <apex:selectList size="1" value="{!count}">
                                <apex:selectOptions value="{!numberOfQuestions }"/>
                                    <apex:actionSupport event="onchange" action="{!showQuestions}" reRender="abcd">
                                        <apex:param name="Domain" value="PHP" assignTo="{!Domain}" />
                                    </apex:actionSupport>
                             </apex:selectList>
        <apex:pageBlockSection title="{!message}" id="abcd">
        </apex:pageBlockSection>
        </apex:pageBlock>
    </apex:form>
</apex:page>

Controller:
public class Custom_Picklist
{
    public String count { get;set;}
    public String Domain { get; set; }
    public String message {get;set;}
    
    public List<SelectOption> numberOfQuestions {get;set;}
    public String selected {get;set;}
    public Custom_Picklist()
    {
        message='';
        this.getnumberOfQuestions();     
    }
    
    public List<SelectOption> getnumberOfQuestions()
    {
        numberOfQuestions = new List<SelectOption>();
        numberOfQuestions.add(new SelectOption('','--None--'));
        numberOfQuestions.add(new SelectOption('5','5'));
        numberOfQuestions.add(new SelectOption('10','10'));
        numberOfQuestions.add(new SelectOption('20','20'));
        numberOfQuestions.add(new SelectOption('30','30'));
        
        return  numberOfQuestions;
    }
    
    public void showQuestions()
    {
        message=Domain+'_'+count;
    }
}