Get text of custom object menu type field in JavaScript API

Summary

Get drop down value ( not id)

Content

Hi all,

I need to get text (option) of a drop down menu field of a custom object added in contact workspace.  I have found an example in this link which suggests to use GetNameValues method but it seems to work with standard objects only. 

 http://documentation.custhelp.com/euf/assets/devdocs/november2013/Connect_Desktop_Integration_JavaScript/Content/Developer Guide/Desktop Integration Using JavaScript/Operational Overview.htm#Option_List_Lookup_Data 

Currently I am using customObject.GetCustomFieldByName(fieldName) which gives the ID of the selected value in the drop down.

Thanks,