PDF Fillable form -not fillable after using Java to send doc by email

Hi there,  
I have a fillable form that has the following:
Team Member fills in then hits button (Java script) opens email to send document to their Leader

Leader completes the remainder of the form then hits their button (Java script) opens an email and sends it to me for processing.

PROBLEM: when the Leader receives the form they are not able to complete their section.  They can choose the fields but can not type in them.