Working with elements from ExtendScript

Hello!

I have a couple of questions concerning working with elements form ExtendScript via FM API.

1) How to assign a text value to an element?

2) Can I insert a new element to an existing element? If it is possible then what objects or functions should I use to do this? They write in a reference that the Element object has Delete() method but I failed to find Insert() method or anything looking like this.

Thank you!