Transition help!

programming flash
1

I have a cool button made from a movie clip with this AS:

stop(); 

this.onEnterFrame = function(){ 
if(rewind == true){ 
prevFrame(); 
} 
} 
  
this.onRollOver = function(){ 
rewind = false; 
play(); 
} 
  
this.onRollOut = function(){ 
rewind = true; 
} 
  
this.onRelease = function(){ 
getURL("site name"); 
}

but I want a transition to occur when I hit it like in this tut:

http://www.kirupa.com/developer/mx2004/transitions.htm

Ive used the AS from the tut. before. Is there a way to use the first AS and make it do this kind of transition?
Thank you for any help!