Hello
I am having some trouble trying to understand actionsupport example.

public with sharing class PassParameterActionSupport 
{
    public String value_entered{get;set;}
    
    public String enteredText1{get;set;}

    public String enteredText2{get;set;}
    
    public void DisplayText()
    {
    
      value_entered=Apexpages.currentPage().getParameters().get('firstParam') + ' ' 
                    + Apexpages.currentPage().getParameters().get('secondParam');
    }
}

<apex:page controller="PassParameterActionSupport">

<apex:form id="frm">

<apex:outputPanel id="resultPanel">

Data entered is : <apex:outputLabel value="{!value_entered}"/>
                  
</apex:outputPanel>
<br/> <br/><br/>

Enter Text 1 :<apex:inputText id="txt1" />
<br />

Enter Text 2 : <apex:inputText id="txt2" />
<br/> <br/>
                 
<apex:actionSupport action="{!DisplayText}"
                    reRender="resultPanel"
                    event="onkeyup">
                     
    <apex:param  assignTo="{!enteredText1}" 
                 name="firstParam" 
                 value="" />
     
     <apex:param assignTo="{!enteredText2}"
                 name="secondParam"  
                 value="" />
   
  </apex:actionSupport>
  
</apex:form>

</apex:page>

I need to get the values of text1 and text2 and just display them.
any body please pinpoint where exactly I am going wrong.

Thanks
krishna