This is a DOM-based game of Snake that I wrote in JavaScript a few years back.
http://patorjk.com/games/snake
Other than the full screen mode demonstrated in the code, it can also be initialized in div tags within a page. Example:
var mySnakeBoard = new SNAKE.Board( {
boardContainer: "game-area",
fullScreen: false,
width: 580,
height:400
});
The comments are formatted a little strange because at the time I was playing around with YUI Doc.