Jell-O Pretzel Salad

2 2/3 cup coarsely chopped pretzels
1 large package frozen strawberries or raspberries
1 1/2 cubes butter
3/4 large carton Cool Whip
12 ounces cream cheese
2 cups pineapple juice
1 1/4 cups sugar
1 large package Jell-O

Beat cream cheese and sugar. Set aside. Mix pretzels and butter. Press into a 9x13 dish. Bake at 400 for 10 minutes. Spread cheese mix over pretzels. Spread cool whip over cheese. Chill. Dissolve Jell-O in hot pineapple juice. Add strawberries. Allow to set. Pour over top and refrigerate. Also excellent with graham cracker crust instead of pretzels. Much easier too!