A nice, concise Web navigation pull-down menu made with CSS

With CSS and JavaScript made a very concise Web navigation menu, but also has a drop-down function Ah! Oh

• item 1


• item 2


• folder 1
  
  
  
  • sub Item 1.1
  
  
  • sub Item 1.2
  
  
  • sub Item 1.3
  
  
  • sub Item 1.4
  
  
  
  


• item 3


• folder 2
  
  
  
  • sub Item 2.1
  
  
  • folder 2.1
    
    
    
    • sub Item 2.1.1
    
    
    • sub Item 2.1.2
    
    
    • sub Item 2.1.3
    
    
    • sub Item 2.1.4
    
    
    
    
  
  
  
  
  


• item 4

rest of content here