The Original LOTR movie (1978)

I bought this and watched it today. . .its OK, but it doesn't resolve!!!!<P>It drops off after the men fight off Saruman's army. . .then it never shows the rest of Frodo's journey. . .I know I'm missing some things, as I've not read the Return of the King yet. . .but surely not that much. . .<P>The last we see of Frodo in the movie is Smeagol leading him to the secret place. . .and then poof! no more of them!<P>I know the movie only covers the first two stories. . .but d'ya think there should have been another movie. . .or something???<P>or was there? if there is another animated movie for ROTK, I sure can't find it!