I think what you mean to say is that you are are looking for the ability to make multiple selections in one or more tables using a single form that allows you create a user record.
So for example a table of users, a table of email address types and a table of email addresses but the user on see a single form where they can enter their name and one or more email addresses and email address types. Does that sound about right? This is a bit different then a many-to-many database relationship. Actually in your form I do not see any things that appear to be what are commonly referred to as many-to-many relationships in database theory. Here is what Wikipedia has to say about database many-to-many relationships: http://en.wikipedia.org/wiki/Many-to-many_%28data_model%29 >From my understanding in classic database theory we talk about many to many 'relationships' and the 'relationships are recorded to a third table. The tables to the left and right of the relationship table both have what resembles a many to one relationship with the "middle" table but they have a many to many relationship with one another. The relationship table is what allows for the many to many relationship. For example: table one = products table two = purchases table three = buyers or products <--> purchases <--> buyers so if products contains soap and john buys some soap then we have the following entry in the purchases table: john, soap but we could also have jill, shoes jill, soap and so on
