Field and then a sub-field to select from

Field and then a sub-field to select from

I want to have a list of industries in a field1.  Field2 would be a list of sub-industries.  I see how I could do this by having comprehensive listing all of sub-industries.  But, is there a way to select an industry, and in the sub-industry field I would only see sub-industries pertaining to the selected industry.  Therefore, if I selected Automotive in field1, I would only see the automotive sub-categories in field2.  

Field 1 - Industry

AUTOMOTIVE
BUSINESS SERVICES
CHILDREN
Field2 - Sub-industries
     Automotive - Appearance Services
     Automotive - Maintenance/Repair
     Automotive - Misc Auto Products
     Automotive - Misc Repair
     Business Services - Advertising/Direct Mail
     Business Services - Business Brokerages
     Business Services - Business Coaching/Consulting
     Business Services - Shipping
     Children - Child Care
     Children - Educational/Tutoring
     Children - Enrichment Programs
     Children - Fitness