<apex:page standardController="CallReportHosp__c" extensions="CtrlCallHospInsert" id="CallsHospInsert">
 <apex:form id="myForm">
  

<script>
window.addSelectedOrganisations = function(Organisations) {
            applyFilterByOrganisations(Organisations);}
</script>

<script>
                        

 if(window.attachEvent)

        window.attachEvent('onload',getV())

     else if(window.addEventListener)

        window.addEventListener('load',getV(),false)

   
                            function getV() {

                            var AccValue = document.getElementById("CallsHospInsert:myForm:pblock:pBS:pBSI:organisation").value;
                            document.getElementById("CallsHospInsert:myForm:pblock:theHiddenInput").value=AccValue;
                            console.log('getv '+AccValue);
//                            console.log('id= '+id);
                            
                            myFun(AccValue); 

                                                                       
                        }
                    </script>

<script>     
 function openLookup(BaseUrl,width,modified,searchstr)
        {
           var receivedUrl=BaseUrl;
           var receivedwidth=width;
           var receivedmodified=modified;
           var receivedsearchstr=searchstr;
           var lookuptype=receivedUrl.substr(receivedUrl.length-3,3);
           if(receivedmodified=='1')
           {
               BaseUrl=BaseUrl+searchstr;
           }
           var urlArr=BaseUrl.split("&");
               //----If you are using this in inline editing then it would be var NxtSpltArr=urlArr[0].split("="); -----------
               var NxtSpltArr=urlArr[1].split("=");
               var txtfrmarr=NxtSpltArr[1];
           if(lookuptype=='001')
           {
             
           if(txtfrmarr.indexOf('organisation')> -1)
               {

                   BaseUrl="/apex/AccountsListforHosp?context=pharma_chain&list=noList&txt="+txtfrmarr;
                   BaseUrl=BaseUrl + "&frm=" + escapeUTF("{!$Component.myForm}");
                   BaseUrl=BaseUrl + "&lksearch=" + searchstr;
               }
           
               
           }
            if(lookuptype=='003')
           {
              
           
           if(txtfrmarr.indexOf('contact')> -1)
               {   
                   var orgid = document.getElementById("CallsHospInsert:myForm:pblock:theHiddenInput").value;
                   BaseUrl="/apex/ContactsListforHosp?context=pharma_chain&list=noList&org="+orgid+"&txt="+txtfrmarr;
                   BaseUrl=BaseUrl + "&frm=" + escapeUTF("{!$Component.myForm}");
                   BaseUrl=BaseUrl + "&lksearch=" + searchstr;
                   console.log('id= '+orgid);
               }               
           }
           openPopup(BaseUrl,"lookup",950,480,"width=1420,height=480,toolbar=no,status=no,directories=no,menubar=no,resizable=yes,scrollable=no",true);   

        }
</script>

 <apex:actionfunction name="applyFilterByOrganisations" action="{!applyFilterByOrganisations}" rerender="organisation" status="asLoadingSelectedOrganisations">
            <apex:param name="selectedOrganisationsStr" value="" assignto="{!selectedOrganisationsStr}" />
        </apex:actionfunction>
                    
<apex:actionfunction name="myFun" action="{!SelectServiceIns}"  reRender="contactPanel,address,theHiddenInput,organisation" immediate="true">
<apex:param name="AccIns" value="" assignTo="{!AccIns}"/>
  
</apex:actionFunction>            
            
            
        <apex:pageBlock mode="edit" id="pblock" >
            <apex:pageMessages id="message" />
            <apex:pageBlockButtons location="top">                                
                <apex:actionStatus id="mySaveStatus1">
                <apex:facet name="stop">
                <apex:commandButton value="Save" action="{!save}" rerender="pblock" status="mySaveStatus1"/>
                </apex:facet>
                <apex:facet name="start">
                <apex:commandButton value="Save" status="mySaveStatus1" disabled="true"/>
                </apex:facet>
                </apex:actionStatus>
                <apex:commandButton value="Cancel" action="{!cancel}"/>
            </apex:pageBlockButtons>
            
   <apex:inputHidden value="{!AccIns}" id="theHiddenInput" />    
      

             
<!--            <apex:outputPanel rendered="{!IF($CurrentPage.parameters.theType = 'app', false, true)}" >-->
            <apex:pageBlockSection columns="2" id="pBS">
                <apex:pageBlockSectionItem id="pBSI">                
                    <apex:outputLabel value="Organisation" for="organisation"/>
                    <apex:inputfield value="{!rep.AccountID__c}" id="organisation" required="true" >
                        <apex:actionSupport event="onchange" action="{!SelectServiceIns}" reRender="contact" status="status" oncomplete="getV(); return true;"  />
                    </apex:inputfield>
                </apex:pageBlockSectionItem>
                
                
                <apex:pageBlockSectionItem >
                    <apex:outputLabel value="Date" for="datetime"/>
                    <apex:inputfield value="{!rep.Date__c}" id="theDate"/>
                </apex:pageBlockSectionItem>
                
                <apex:pageBlockSectionItem >
                    <apex:outputLabel value="Address"/>
                    <apex:outputText value="{!BillingCity},{!BillingStreet}" id="address" >
                    </apex:outputText>

some code.....

public class CtrlCallHospInsert {
  public Set<Id> selectedOrganisationsIds  { get; set; }
    public String selectedOrganisationsStr { get; set; }


public CallReportHosp__c rep {get; set;}

public Id AccIns{get;set;}
public String BillingCity{get;set;}
public String BillingStreet{get;set;}

private Account rep2;

public void applyFilterByOrganisations() {
        this.selectedOrganisationsIds = new Set<Id>();
        if(String.isBlank(this.selectedOrganisationsStr) || this.selectedOrganisationsStr == '[]') {
            return;
        }
        String[] OrganisationsIds = this.selectedOrganisationsStr.remove('[').remove(']').remove(' ').split(',');
        for(String s : OrganisationsIds) {
            if(!String.isBlank(s)) {
                rep.AccountID__c=s;
            }
        }
        this.selectedOrganisationsStr = null;
    }

private ApexPages.StandardController controller { get; set; }

    public CtrlCallHospInsert(ApexPages.StandardController controller) {
         this.controller = controller;
         this.rep = new CallReportHosp__c();
         this.rep.AccountID__c=NULL;
         this.rep.ContactID__c=NULL;
         this.rep.Duration__c='30 min';
         this.BillingCity=''; this.BillingStreet='';
         this.AccIns=NULL;
    }



public PageReference save(){
        
        try {
            insert rep;
        }catch (Exception e){
            ApexPages.addmessage(new ApexPages.message(ApexPages.severity.ERROR, '"Something went wrong !"'));
        }
        PageReference pageRef = Page.CallsHospList;
        pageRef.setRedirect(true);
        return pageRef;
    }
    
    
public PageReference SelectServiceIns(){
System.debug('select ');
 System.debug('acc = '+this.AccIns);
 rep2=[Select id, BillingCity, BillingStreet  FROM Account where id=:this.AccIns];
 this.rep.AccountID__c=rep2.id;
 this.rep.put('AccountID__c',rep2.id);
 System.debug('new value= '+this.rep.get('AccountID__c'));
 System.debug('accvalue= '+AccIns);
      this.AccIns=rep2.id;
      System.debug('new acc = '+this.AccIns);
      this.BillingCity=rep2.BillingCity;
      this.BillingStreet=rep2.BillingStreet;  
return null;
}

    
 public PageReference cancel() {
        PageReference pageRef = Page.CallsHospList;
        pageRef.setRedirect(true);
        return pageRef;        
    }
    
}

<apex:page standardcontroller="Account" recordsetvar="accounts" extensions="AccountsListforHosp" showheader="false" sidebar="false" title="Search" tabstyle="Account" id="pg">
        
    
     

       

    <apex:form >

       
            some code...
            
           
            
            <div id="resultsLoadingIndicator" class="waitingSearchDiv" style="position: relative; display: none; width: 100%; height: 420px; background: #fff;">
                <div class="waitingHolder" style="width: 75px; top: 59.8px;">
                    <img src="/img/loading.gif" class="waitingImage" title="{$Label.TM_Please_Wait}" />
                    <span class="waitingDescription">{!$Label.TM_Loading}</span>
                </div>
            </div>
            <div id="resultsPanel">
                <apex:outputpanel id="pnlSearchResults" style="background:white;height:420px;overflow-Y:auto;" layout="block">
                    
                                            
                    <script type="text/javascript">
                        function addSelectedOrganisations() {
                            var searchContext = "{!searchContext}";
                            var parentWindow = top.parent.window;
                            if(searchContext === "brick") {
                                parentWindow.opener.addSelectedBricks("{!selectedRecords}");
                            } else { if (searchContext === "pharma_chain") {
                                parentWindow.opener.addSelectedOrganisations("{!selectedRecords}");}
                                else {parentWindow.opener.addSelectedParents("{!selectedRecords}");}
                            } 
                            parentWindow.close();
                        }
                         function addSelectedOrganisationsIns() {
                            var searchContext = "{!searchContext}";                            
                            var parentWindow = top.parent.window;                            
                            if (searchContext === "pharma_chain") {
                                parentWindow.opener.addSelectedOrganisationsIns("{!selectedRecords}");}                               
                            parentWindow.close();
                        }
                    </script>

                    <apex:pageblocktable value="{!searchResults}" var="res">                   
                        <apex:column headervalue="" style="width:25px" rendered="{!ListCalls}">
                            <apex:facet name="header">
                                <input type="checkbox" id="checkAll" onclick="checkAllBoxes(this,'TM_search_checkbox');" />                                
                            </apex:facet>
                            <apex:inputcheckbox value="{!res.isSelected}" styleclass="TM_search_checkbox" />
                        </apex:column>
                        
                        <apex:column value="{!res.record.Name}" rendered="{!ListCalls}" />
                        <apex:column rendered="{!Not(ListCalls)}">
<!--                            <apex:outputLink value="javascript:top.window.opener.lookupPick2('{!FormTag}','{!TextBox}_lkid','{!TextBox}','{!res.record.Id}','{!res.record.Name}', false)" rendered="{!NOT(ISNULL(res.record.Id))}">{!res.record.Name}</apex:outputLink> -->
<!--<apex:outputLink value="javascript:top.window.opener.lookupPick2('{!FormTag}','{!TextBox}_lkid','{!TextBox}','{!res.record.Id}','{!res.record.Id}', false)" >{!res.record.Name}</apex:outputLink> -->
<apex:outputLink value="javascript:top.window.opener.lookupPick2('{!FormTag}','{!TextBox}_lkid','{!TextBox}','{!res.record.Id}','{!res.record.Id}', false)" rendered="{!NOT(ISNULL(res.record.Id))}">{!res.record.Name}</apex:outputLink>

                        </apex:column>
                        <apex:column value="{!res.record.Proxima_External_Id__c}" />
                        <apex:column value="{!res.record.Brick_Description__c}" rendered="{!isBricksSearch}" />
                        <apex:column value="{!res.record.BillingCity}" rendered="{!isPharmacyChainsSearch}" />
                        <apex:column value="{!res.record.BillingStreet}" rendered="{!isPharmacyChainsSearch}" />

                    </apex:pageblocktable>

                </apex:outputpanel>
            </div>
            
some code

            </apex:panelgrid>
        </apex:pageblock>
    </apex:form>
</apex:page>