heres the intro.
there are two ways to play the intro here they are

e-3-----3~-----------------0---1-| 
b--3----3~------5----1-1-1---0-1-| 
g---5---5~-4-5--5-5--2-2-2---0-2-| 
d----5--5~-5-5----5--2-2-2---0-3-| 
a-------3~-----------------------| 
e--------------------------------| 

==========================================================
here is that guitar slide he does

e-----------------------| 
b-----------------------| 
g-5--5/4---4/-2-2-2-0---| 
d-5--5-----5/-3-3-0-0---| 
a-----------------------| 
e-----------------------| 

behind those eyes of blue

==============================================================
here is the other way to do the intro

e-3----0-0-0-3-0-0---0--0-1----| 
b--3---1-0-1-1-0-1-1----0-1----| 
g---5--0-0-0-0-0-2-2----0-2----| 
d----5-2-2-2-2-0-2-2----0-3----| 
a------3-3-3-3-0-0------0------| 
e------------------------------| 


e------------------| 
b------------------| 
g-5-5/4--4/2-2-2-0-| 
d-5-5----5/3-3-0-0-| 
a------------------| 
e------------------| 

tabbed by james pugrad