in my contacts table related to the customer where its a one to many relationship.  I have 2 phone number fields one for phone and one for mobile.  I may or may not have both numbers available.  I have a dlookup for the phone number and that works fine, but if i have just a mobile number id like to search for that as well and use it if the phone number returns null.  Not sure how to approach this.  Thank you in advance