ContactViewAdd.vfp

<apex:page controller="ContactsViewAddController" tabStyle="Contact">
  <apex:form id="parentForm">
      <apex:pageMessages />
      <apex:pageBlock title="Add Contacts" id="addContactsDiv">
          <apex:pageBlockTable value="{!contactsToAdd}" var="cont"> 
              <apex:column headerValue="First Name">
                  <apex:inputField value="{!cont.FirstName}"/>
              </apex:column>
              <apex:column headerValue="Last Name">
                  <apex:inputField value="{!cont.LastName}"/>
              </apex:column>
              <apex:column headerValue="Phone">
                  <apex:inputField value="{!cont.Phone}"/>
              </apex:column>
              <apex:column headerValue="Email">
                  <apex:inputField value="{!cont.Email}"/>
              </apex:column>
          </apex:pageBlockTable>
          <apex:pageBlockButtons >
              <apex:commandButton action="{!save}" value="Save"/>
              <apex:commandButton action="{!addContact}" value="Add Contact" reRender="addContactsDiv"/>
          </apex:pageBlockButtons>
      </apex:pageBlock>
      <apex:pageBlock title="View Contacts" id="viewContactsDiv" rendered="{!isSaved}">
          <apex:pageBlockTable value="{!contactsToView}" var="cont"> 
              <apex:column headerValue="First Name" value="{!cont.FirstName}"/> 
              <apex:column headerValue="Last Name" value="{!cont.LastName}"/>
              <apex:column headerValue="Phone" value="{!cont.Phone}"/>
              <apex:column headerValue="Email" value="{!cont.Email}"/>
          </apex:pageBlockTable>
          <apex:pageBlockButtons >
              <apex:repeat value="{!pageNumberArray}" var="pageNumber">
                  <a href="javascript:viewItem('{!pageNumber}');"> {!pageNumber} </a>
              </apex:repeat>
              <apex:actionFunction action="{!changePage}" name="viewItem"  reRender="parentForm" immediate="true">
                 <apex:param name="selectedPgNo" value="" assignTo="{!selectedPageNumber}"/>
              </apex:actionFunction>
          </apex:pageBlockButtons>
      </apex:pageBlock>     
  </apex:form>
</apex:page>