Visibility hidden
    Spec
    
    Setting a table to visibility:hidden, but rows and cells to different visibility values.
    
    
      
        
            
                row 1
            
            
                
            
        
        
            
                row 2
            
            
                
            
        
        
            
                row 3
            
            
                
            
        
      
    
    Bottom table is identical to top, except entire table is hidden, the second row
    is visible with a nested hidden cell, and the third row is visible with a nested
    hidden span.
    
      
        
            
                row 1
            
            
                
            
        
        
            
                row 2
            
            
                
            
        
        
            
                row 3