1. The pack of cards is shuffled
2. Four cards are dealt face-up in a row
3. If two cards on the top of any of the four piles form a pair (ie same number irrelevant of the suit)they are discarded
4. When all pairs have been taken, step two is repeated, dealing on top of the previous  cards.  If all cards have been dealt then the game is over.
5. If all cards have been dealt, and in the process all cards have been discarded in pairs then the game has been won.

The game uses the following JavaScript:

Constructs;

• Sequence
• Iteration (For/ do, while/do, repeat until loop)
• Selection (If, then, Else or case)

• Setting variables
• Using arrays
• Usingevent handlers
• Using the eval () statement
• Using the string object
• Creating custom objects
• Dynamically updating form fields

• Displays the current top card on each of the four piles of cards
• Radio buttons to select the two matching cards to be removed
• Control buttons to
• Remove the selected pair
• Deal four new cards
• Start a new game
• Quit
• Counters to display
• Cards left in the pack
• Pairs of cards removed

• The four cards are displayed as text labels in the text input fields called card1, card2, card3 and card4.
• Two cards (choice1 and choice2) are selected using two sets of radio buttons.
• Two additional text fields called "hands" and "Taken" are used to display the cards left in the pack and cards taken.

• take is used to discard  a selected pair. (an onClick event handler calls the takeCards() function)
• deal is used to deal four new cards (an onClick event handler calls the dealCards() function)
• start is used to start a new game. (an onClick event handler calls the startGame() function)
• exit is used to quit playing. (an HTML document with a goodbye message by assigning  anew URL to self.location)