Lead / Qualify - can it be cancelled?

Question

I am >   CRM 2011 RU13 On-Premise
I'm trying to cancel the Lead / Qualify step but am receiving an error. All code seems to work
properly except the "ExecutionObj.getEventArgs().preventDefault();" statement that will cancel this step.
Code & error follow.
Thanks in advance for your assistance
function Form_onsave(ExecutionObj)
var eventmode=ExecutionObj.getEventArgs().getSaveMode();
 if (ocbuItem == "Residential Sales")
      if (eventmode == 1 || eventmode == 2)
//  save = 1 ,  save & close = 2
           if(Xrm.Page.getAttribute("new_resleaddetail").getValue() == null)
var msg = "Reminder: Res Lead Detail field is required";
alert(msg);
                // Give the control focus.
Xrm.Page.ui.controls.get("new_resleaddetail").setFocus(true);
ExecutionObj.getEventArgs().preventDefault();
      if (eventmode == 16)
// 16 = qualify option chosen from the convert lead dialog box
          var msg = "You chose QUALIFY, this is outside the scope of your usage. 
Please select DISQUALIFY.";
          alert(msg);
          // Cancel the qualify operation.
              ExecutionObj.getEventArgs().preventDefault();
    }  // end residential sales
} // end onsave
Microsoft Dynamics CRM Error Report Contents
<CrmScriptErrorReport>
  <ReportVersion>1.0</ReportVersion>
  <ScriptErrorDetails>
   <Message>Unable to get value of the property 'parentNode': object is null or undefined</Message>
   <Line>1</Line>
   <URL>/main.aspx?etc=4&extraqs=%3f_gridType%3d4%26etc%3d4%26id%3d%257b6FFB77C6-F50F-E311-A0FB-005056814586%257d%26pagemode%3diframe%26preloadcache%3d1379093638422%26rskey%3d908545450&pagetype=entityrecord</URL>
   <PageURL>/main.aspx?etc=4&extraqs=%3f_gridType%3d4%26etc%3d4%26id%3d%257b6FFB77C6-F50F-E311-A0FB-005056814586%257d%26pagemode%3diframe%26preloadcache%3d1379093638422%26rskey%3d908545450&pagetype=entityrecord</PageURL>
   <Function></Function>
   <CallStack>
   </CallStack>
  </ScriptErrorDetails>
  <ClientInformation>
   <BrowserUserAgent>Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; InfoPath.2; .NET4.0E; MS-RTC EA 2)</BrowserUserAgent>
   <BrowserLanguage>en-us</BrowserLanguage>
   <SystemLanguage>en-us</SystemLanguage>
   <UserLanguage>en-us</UserLanguage>
   <ScreenResolution>1680x1050</ScreenResolution>
   <ClientName>Web</ClientName>
   <ClientTime>2013-09-13T13:34:17</ClientTime>
  </ClientInformation>
  <ServerInformation>
    <OrgLanguage>1033</OrgLanguage>
    <OrgCulture>1033</OrgCulture>
    <UserLanguage>1033</UserLanguage>
    <UserCulture>1033</UserCulture>
    <OrgID>{D0B813F1-3BD1-E111-8F27-005056814586}</OrgID>
    <UserID>{EB773814-3DD1-E111-8F27-005056814586}</UserID>
    <CRMVersion>5.0.9690.3448</CRMVersion>
  </ServerInformation>
</CrmScriptErrorReport>

Answer 1

Al,
I started the original post ...........  the following code does work...
Hope this helps.
function Form_onsave(ExecutionObj)
//function Form_onsave()
//debugger;
var eventmode=ExecutionObj.getEventArgs().getSaveMode();
//       alert('event mode is '+ eventmode);
//Build an array with Comporium Business Unit values  >>>>
  var arrcbu = new Array;
  arrcbu = Xrm.Page.getAttribute("new_comporiumbusinessunitid").getValue();
  if (arrcbu != null)
       var ocbuItem = arrcbu[0].name;
//       alert('Comporium bus unit name = '+ ocbuItem);
//>>>>>>>>>>>>>>>>> RESIDENTIAL SALES <<<<<<<<<<<<<
// When BU = Residential Sales and EVENT.mode = QUALIFY
// we want to CANCEL this operation.  Because its 'residential',
// These users will never qualify and convert a lead. 
  if (ocbuItem == "Residential Sales")
      if (eventmode == 1 || eventmode == 2)
//      if (event.Mode == 1 || event.Mode == 2)
                 //  save = 1 ,  save & close = 2
//           if(crmForm.all.new_resleaddetail.DataValue == null)
           if(Xrm.Page.getAttribute("new_resleaddetail").getValue() == null)
                var msg = "Reminder: Res Lead Detail field is required";
                alert(msg);
                // Give the control focus.
//                crmForm.all.new_resleaddetail.SetFocus();
                Xrm.Page.ui.controls.get("new_resleaddetail").setFocus(true);
//                event.returnValue = false;
//                return false;
                ExecutionObj.getEventArgs().preventDefault();
//           if(crmForm.all.new_resleadstatus.DataValue == null)
             else if(Xrm.Page.getAttribute("new_resleadstatus").getValue() == null)
                         var msg = "Reminder: Res Lead Status field is required";
                         alert(msg);
                         // Give the control focus.
//                         crmForm.all.new_resleadstatus.SetFocus();
                         Xrm.Page.ui.controls.get("new_resleadstatus").setFocus(true);
//                         event.returnValue = false;
//                         return false;
                         ExecutionObj.getEventArgs().preventDefault();
//           if(crmForm.all.new_spiffeligible.DataValue == null)
              else if(Xrm.Page.getAttribute("new_spiffeligible").getValue() == null)
                           var msg = "Reminder: SPIFF Eligible field is required";
                           alert(msg);
                           // Give the control focus.
//                           crmForm.all.new_spiffeligible.SetFocus();
                           Xrm.Page.ui.controls.get("new_spiffeligible").setFocus(true);
//                           event.returnValue = false;
//                           return false;
                           ExecutionObj.getEventArgs().preventDefault();
        }  // end event mode 1 & 2
      if (eventmode == 16)
//      if (event.Mode == 16)
             // 16 = qualify option chosen from the convert lead dialog box
            var msg = "You chose QUALIFY, this is outside the scope of your usage.  Please select DISQUALIFY.";
            alert(msg);
          // Cancel the qualify operation.
//              event.returnValue = false;
//              return false;
            ExecutionObj.getEventArgs().preventDefault();
        } // end event mode = 16
    }  // end residential sales
} // end onsave