Greetings, I have been working on a Visualforce popup page that mimics Salesforce's Contact and Account Lookup Dialog and QuickCreate functionality as part of app I'm building for batch creating records for a custom object.

This VF page, based on Jeff Douglas's Rollup your own Salesforce Lookup Popup enables our users to create Contact records. Now I recently created another lookup like this one for accounts, where when a user types an account or looks up an account to connect a new contact to an existing Salesforce account. I added some Javascript to force the Account lookup to open and run the custom Account lookup I created, however, with the script, I still get the Salesforce standard lookup, where should I place this code (attached below) or what should I add to enable the custom page I built to open.

Hope it helps.

Code for the Visualforce page

<apex:page controller="ContactLookupControl"
  title="Search"
  showHeader="false"
  sideBar="false"
  tabStyle="Contact"
  id="pg">
  <apex:form >
  <apex:outputPanel id="page" layout="block" style="margin:5px;padding:10px;padding-top:2px;">
  <apex:tabPanel switchType="client" selectedTab="name1" id="tabbedPanel">
    <!-- SEARCH TAB -->
      <apex:tab label="Search" name="tab1" id="tabOne"> 
      <apex:actionRegion > 
      <apex:outputPanel id="top" layout="block" style="margin:5px;padding:10px;padding-top:2px;">
        <apex:outputLabel value="Search" style="font-weight:Bold;padding-right:10px;" for="txtSearch"/>
        <apex:inputText id="txtSearch" value="{!searchString}" />
          <span style="padding-left:5px"><apex:commandButton id="btnGo" value="Go" action="{!Search}" rerender="searchResults"></apex:commandButton></span>
      </apex:outputPanel>
   
       <apex:outputPanel id="pnlSearchResults" style="margin:10px;height:350px;overflow-Y:auto;" layout="block">
        <apex:pageBlock id="searchResults">
          <apex:pageBlockTable value="{!results}" var="a" id="tblResults">
            <apex:column >
              <apex:facet name="header">
                <apex:outputPanel >Name</apex:outputPanel>
              </apex:facet>
               <apex:outputLink value="javascript:top.window.opener.lookupPick2('{!FormTag}','{!TextBox}_lkid','{!TextBox}','{!a.Id}','{!JSENCODE(a.Name)}', false);self.close();" rendered="{!NOT(ISNULL(a.Id))}">{!a.Name}</apex:outputLink>    
            </apex:column>
        <apex:column >
              <apex:facet name="header">
                <apex:outputPanel >Account Name</apex:outputPanel>
              </apex:facet>
               {!a.Account.Name}   
            </apex:column>
        <apex:column >
              <apex:facet name="header">
                <apex:outputPanel >Street</apex:outputPanel>
              </apex:facet>
               {!a.MailingStreet}   
            </apex:column>
  <apex:column >
              <apex:facet name="header">
                <apex:outputPanel >City</apex:outputPanel>
              </apex:facet>
               {!a.MailingCity}   
            </apex:column>
 <apex:column >
              <apex:facet name="header">
                <apex:outputPanel >State</apex:outputPanel>
              </apex:facet>
               {!a.MailingState}   
            </apex:column>
 <apex:column >
              <apex:facet name="header">
                <apex:outputPanel >Postal Code</apex:outputPanel>
              </apex:facet>
               {!a.MailingPostalCode}   
            </apex:column>
<apex:column >
              <apex:facet name="header">
                <apex:outputPanel >Phone</apex:outputPanel>
              </apex:facet>
               {!a.Phone}   
            </apex:column>
<apex:column >
              <apex:facet name="header">
                <apex:outputPanel >Email</apex:outputPanel>
              </apex:facet>
               {!a.Email}   
            </apex:column>
          </apex:pageBlockTable>
        </apex:pageBlock>
       </apex:outputPanel>
      </apex:actionRegion>
    </apex:tab>
    <!-- NEW CONTACT TAB -->
    <apex:tab label="New Contact" name="tab2" id="tabTwo">
        <apex:pageBlock id="newContact" title="New Contact" >
          <apex:pageBlockButtons >
            <apex:commandButton action="{!saveContact}" value="Save & Close"/>
          </apex:pageBlockButtons>
          <apex:pageMessages />
          <apex:pageBlockSection columns="2">
              <apex:inputField value="{!Contact.FirstName}"/>
              <apex:inputField value="{!Contact.LastName}"/>
              <apex:inputField value="{!Contact.AccountId}"/>
              <apex:inputField value="{!Contact.MailingStreet}"/>
              <apex:inputField value="{!Contact.MailingCity}"/>
              <apex:inputField value="{!Contact.MailingState}"/>
           <apex:inputField value="{!Contact.MailingPostalCode}"/>
           <apex:inputField value="{!Contact.MailingCountry}"/>
           <apex:inputField value="{!Contact.Phone}"/>
           <apex:inputField value="{!Contact.Email}"/>
          </apex:pageBlockSection>
        </apex:pageBlock>   
        <script>
        if({!Contact.id!=null}){
            //alert('{!Contact.Name} {!Contact.id}');
            top.window.opener.lookupPick2('{!FormTag}','{!TextBox}_lkid','{!TextBox}','{!Contact.Id}','{!JSENCODE(Contact.Name)}', false);self.close();
        }
        </script>
         <script>
var overwriteObj3="001"; var overwriteObjConf="Account";   var overwriteObjC="003"; var overwriteObjConfC="Contact";
function getParameterByName( name ,url){
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( url );
  if( results == null )
    return "";
  else
    return decodeURIComponent(results[1].replace(/\+/g, " "));
}

var lookupPickOrig=null;
$(document).ready(function(){
$("body").bind("OnRenderDone",function(){
    if(lookupPickOrig==null){
        lookupPickOrig= openLookup;//save old function if needed
    }
    openLookup=function(a, b,c, d,e,f,g,l){//overwrite with your custom code
    //alert(a+"~"+b+"~"+c+"~"+d+"~"+e+"~"+f+"~"+g+"~"+l);
    var ax=a;
    if(ax.indexOf("lktp=001”)>-1){
        var lknm=getParameterByName("lknm",ax);
        var lkfm=getParameterByName("lkfm",ax);
        var lksrch=getParameterByName("lksrch",ax);
        //alert(b+"~"+c+"~"+d+"~"+e+"~"+f+"~"+g+"~"+l);
        ax="/apex/AccountLookupControl?"+(ax.split("?")[1]+"&frm="+escape(lkfm)+"&txt="+escape(lknm)+d);
//        lookupPickOrig(ax, b,c, d,e,f,g,l);
        window.open(ax,"_blank","width=690,height=690");
    }else{
        lookupPickOrig(ax, b,c, d,e,f,g,l);
    }
    //put your code here
    }
});
});
</script>
    </apex:tab>
  </apex:tabPanel>
  </apex:outputPanel>
  </apex:form>
</apex:page>

The Script that should open the custom popup and bypass the standard Salesforce account lookup dialog
 

<script>
var overwriteObj3="001";
var overwriteObjConf="Account";
 
var overwriteObjC="003";
var overwriteObjConfC="Contact";
​
function getParameterByName( name ,url){
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( url );
  if( results == null )
    return "";
  else
    return decodeURIComponent(results[1].replace(/\+/g, " "));
}

var lookupPickOrig=null;
$(document).ready(function(){
$("body").bind("OnRenderDone",function(){
    if(lookupPickOrig==null){
        lookupPickOrig= openLookup;//save old function if needed
    }
    openLookup=function(a, b,c, d,e,f,g,l){//overwrite with your custom code
    //alert(a+"~"+b+"~"+c+"~"+d+"~"+e+"~"+f+"~"+g+"~"+l);
    var ax=a;
    if(ax.indexOf("lktp=001”)>-1){
        var lknm=getParameterByName("lknm",ax);
        var lkfm=getParameterByName("lkfm",ax);
        var lksrch=getParameterByName("lksrch",ax);
        //alert(b+"~"+c+"~"+d+"~"+e+"~"+f+"~"+g+"~"+l);
        ax="/apex/AccountLookupControl?"+(ax.split("?")[1]+"&frm="+escape(lkfm)+"&txt="+escape(lknm)+d);
//        lookupPickOrig(ax, b,c, d,e,f,g,l);
        window.open(ax,"_blank","width=690,height=690");
    }else{
        lookupPickOrig(ax, b,c, d,e,f,g,l);
    }
    //put your code here
    }
});
});
</script>