How to add the contacts tab to the incident form, to cascade / list all contacts from the site, acco

[mania]

Hi,

How to add the contacts tab to the incident form, to cascade / list all contacts from the site, account and parent account for Incident form.
I have wrote one script but not working completely and please correct my code if needed.
Can anyone help on this. It will be helpful.

 var current = new GlideRecord('incident');

      current.get('b792c2ea1be4c65018d297d8b04bcb1d');

      var accounts = addAccount(current.u_account);

      var site = addSite(current.u_site);

    var acc_str = "";

    var site_str = "";

    var acct = '';

 function addAccount(account) {

//          gs.print("account in function : "+ account);

        acct += "," + account;

      //  gs.print(acct + "testing");

        var checkParent = new GlideRecord("customer_account");

        checkParent.get(account);

        if (checkParent.account_parent) {

            return addAccount(checkParent.account_parent);

        }

        return acct;

}

function addSite(site){

    site_str +="," + site;

return site_str;

}

 gs.print("site_str : "+ site.split(',').slice(1));  // we are getting Site sys_id ;

   gs.print(accounts.split(',').slice(1));    // we are getting account SYS_ID;  

   function getContacts(account,site){

    var cust = new GlideRecord('customer_contact');

    cust.addQuery('account', account).addOrCondition('u_site', site);

    cust.query()

   }

Thanks in Advance!