This is 99.9% correct. i got the exact chord changes off of Van Morrison's website 
:http://www.harbour.sfu.ca/~hayward/van/van.html

You can play the intro many ways. This is what I think is the closest.

Enjoy this amazing easy song!

Intro (see bottom of page)

G                 C  G             D 
Hey where did we go? Days when the rain came.
G         C       G             D
Down in a hollow, playing a new game.
G              C                G             D
Laughin' and a running,hey hey. Skipin' and a jumpin'
G            C            G       D                    C
In the misty mornin fog, with our hearts a thumpin'and you,
D             G     Em   C      D           G
my brown eyed girl(run#1)You my, Brown eyed girl(run#2)

G         C             G          D 
What ever happened, to tuesday and so slow?
 G                 C              G          D
Going down to the old mine with a transistor radio
G               C                  G               D        
Standing in the sunlight laughing, hiding behind a rainbow's wall 
G              C                  G             D       
Slipping and a sliding, hey, hey, All along the waterfall with 
C    D              G     Em     C      D           G
you, my brown eyed girl.(Run #1) You, my brown eyed girl


Bridge:
D                    C           G
Do you remember when we used to sing?
G             /C           /G             /D                
Sha la la la  la la la la  la la la la te da   Just like that
G             /C           /G              /D          /G
Sha la la la  la la la la  la la la la te   da    la te da (Bass solo)
 
G           C             G           D         
So hard to find my way,  Now that I'm on my own 
G                  C          G       D           
I saw you just the other day, my, how you have grown
G              C                G              D			    D
Cast my memory back there Lord. Sometimes I'm overcome thinkin' 'bout.

G                 C          G          D            C
Makin' love in the green grass behind the stadium with you,
D              G     Em    C      D            G
my brown eyed girl(Run # 1)you, my brown eyed girl


Bridge.


Intro 

  --------------------------|-12--13----15----13----12------
  --12--13--15--13---12-----|-------------------------------
  ----------------------------------------------------------   
  ----------------------------------------------------------
  ----------------------------------------------------------
  ----------------------------------------------------------                                                           

------------------------|---------------10------------------
---12--13--15--13--12---|-------12--13----------------------
------------------------|---11------------------------------
------------------------------------------------------------
------------------------------------------------------------
------------------------------------------------------------

Run # 1
   G                C
---3---5---3--2--0-----------------------------------------------
----------------------0-----0---1/3--5--8---7---5---7--8------
-------------------------0------------------------------------------
---------------------------------------------------------------------
---------------------------------------------------------------------
---------------------------------------------------------------------

Run#2
     D        C            G
----10--10----8--7--------------------------------------------
---------------------10----8----------------------------------
--------------------------------------------------------------
--------------------------------------------------------------
--------------------------------------------------------------
--------------------------------------------------------------


Bass solo:

-------------------------------------
-------------------------------------
----------------0--------------------
----------2-2-4----------------------
------2-3-------------2-3-5-5-3-2-0--
-3-3-3-------------3-3---------------