I have showed student records but,when we click on ther  "Getupdate" filed what is the value in the "Snumber" go to controller if it is working
   when "<apex:column rendered="true">" if make is false the value the "snumber" did not pass to controller 

  Please help me out!!!!!!!!!!!

<apex:pageblocktable value="{!studentlistwrapper}" var="e1" id="therepeat">                    
                    <apex:column rendered="true">
                     <apex:facet name="header">count</apex:facet> 
                        <apex:inputText value="{!e1.Snumber}" id="count" /> 
                    </apex:column>  /* i dont want to show this in visuvalforce page */


                    <apex:column > 
                        <apex:facet name="header">GetUpdated</apex:facet> 
                        <apex:inputfield value="{!e1.Studentname}" id="key"  onchange="populateKeyRecord((document.getElementById('{!$Component.count}')).value)"> 
                              <!-- <apex:actionSupport event="onchange" action="{!Add}"/>  -->                             
                           
                        </apex:inputfield>
                   </apex:column>

           </apex:pageblockTable>

         <apex:actionFunction action="{!populateKeyRecord}" name="pouluate" reRender="st" immediate="true">
             
                     <apex:param name="strcount" assignTo="{!strcount}" value=""/>
               
            </apex:actionFunction>