Hide/Unhide

Hi
I am trying to hide some lines that are not needed most of the time. I am trying to make them accessible with the click of a button if they are. Can you tell me what is wrong with the code I am using? I keep getting else with out if and i just do not get it.

'If Rows("9:11").EntireRow.Hidden = True Then
    Rows("9:11").EntireRow.Hidden = False
   Else
If Rows("9:11").EntireRow.Hidden = False Then
    Rows("9:11").EntireRow.Hidden = True
End If