Drop down menu - sub menu remains open on the appropriate page

Info

• Home
  • Home 1
  • Home 2
  • Home 3
  • Home 4
  • Home 5
• Products
  • Products 1
  • Products 2
  • Products 3
  • Products 4
  • Products 5
• Services
  • Services 1
  • Services 2
  • Services 3
  • Services 4
  • Services 5
• Support
  • Support 1
  • Support 2
  • Support 3
  • Support 4
  • Support 5
• Info
  • Info 1
  • Info 2
  • Info 3
  • Info 4
  • Info 5