// global variables
var tally = new Array(14)
var nextcard = 1;
var nexti = new Image(53,68);
// numeric comparison for sort()
function numsort(a, b) {
return a - b;
}
function InitGame() {
if (!document.getElementById) return;
stat=document.getElementById("status");
stat.innerHTML="Next Card";
nextcard = 1;
// array for board contents
board = new Array(26);
for (i=1; i<26; i++) {
board[i] = new Card(0,"x");
obj=document.getElementById("card"+i);
obj.src = "blank.gif";
obj.onclick = PlaceCard;
}
// fill the deck (in order, for now)
deck = new Array(53);
for (i=1; i<14; i++) {
deck[i] = new Card(i,"c");
deck[i+13] = new Card(i,"h");
deck[i+26] = new Card(i,"s");
deck[i+39] = new Card(i,"d");
}
// Clear the scores
Score();
// shuffle the deck
n = Math.floor(100 * Math.random() + 200);
for (i=1; i<n; i++) {
c1 = Math.floor(52*Math.random() + 1);
c2 = Math.floor(52*Math.random() + 1);
temp = deck[c2];
deck[c2] = deck[c1];
deck[c1] = temp;
}
// draw the first card on screen
next=document.getElementById("dcard");
next.src = deck[nextcard].fname();
// preload the next image
nexti.src = deck[nextcard+1].fname();
obj=document.getElementById("newgame")
obj.onclick=InitGame;
} // end InitGame
// place the draw card on the board where clicked
function PlaceCard(e) {
if (!e) var e = window.event;
// which space on the board was clicked?
thiscard = (e.target) ? e.target: e.srcElement;
pos = thiscard.id.substring(4);
if (board[pos].suit != "x") {
return;
}
drawcard=document.getElementById("dcard");
thiscard.src = deck[nextcard].fname();
drawcard.src = "blank.gif";
board[pos] = deck[nextcard];
nextcard++;
Score();
// Game over?
if (nextcard > 25) {
EndGame();
}
else {
drawcard.src = deck[nextcard].fname();
// cache next image for draw pile
nexti = new Image(53,68);
nexti.src = deck[nextcard+1].fname();
}
}
// check for completed rows and display row scores
function Score() {
score=document.getElementById("totalscore");
totscore = 0;
// rows
for (x=0; x<5; x++) {
r = x * 5 + 1;
a =
AddScore(board[r],board[r+1],board[r+2],board[r+3],board[r+4]
 ,"row"+x);
totscore += a;
}
// columns
for (x=0; x<5; x++) {
r = x + 1;
a =
AddScore(board[r],board[r+5],board[r+10],board[r+15],board[r+20]
,"col"+x);
totscore += a;
}
// diagonals
a = AddScore(board[5],board[9],board[13],board[17]
,board[21],"diag1")
totscore += a;
a = AddScore(board[1],board[7],board[13],board[19]
,board[25],"diag2")
totscore += a;
score.firstChild.nodeValue = totscore;
}
// check for poker hands
function AddScore(c1,c2,c3,c4,c5,scorebox) {
obj=document.getElementById(scorebox);
straight = false;
flush = false;
royal = false;
pairs = 0;
three = false;
// sorted array for convenience
nums = new Array(5);
nums[0] = c1.num;
nums[1] = c2.num;
nums[2] = c3.num;
nums[3] = c4.num;
nums[4] = c5.num;
nums.sort(numsort);
// no score if row is not filled
if (c1.num == 0 || c2.num == 0 || c3.num == 0
|| c4.num == 0 || c5.num == 0) {
obj.innerHTML="";
return 0;
}
// flush
if (c1.suit == c2.suit && c2.suit == c3.suit
&& c3.suit == c4.suit && c4.suit == c5.suit) {
flush = true;
}
// straight
if (nums[4] - nums[3] == 1
&& nums[3] - nums[2] == 1
&& nums[2] - nums[1] == 1
&& nums[1] - nums[0] == 1) {
straight = true;
}
// royal straight (10, J, Q, K, A)
if (nums[1] == 10 && nums[2] == 11 && nums[3] == 12
&& nums[4] == 13 && nums[0] == 1) {
straight = true;
royal = true;
}
// royal flush, straight flush, straight, flush
if (straight && flush && royal) {
obj.innerHTML="Royal Flush<br>250";
return 250;
}
if (straight && flush) {
obj.innerHTML="Straight Flush<br>50";
return 50;
}
if (straight) {
obj.innerHTML="Straight<br>4";
return 4;
}
if (flush) {
obj.innerHTML="Flush<br>5"
return 5;
}
// tally array is a count for each card value
for (i=1; i<14; i++) {
tally[i] = 0;
}
for (i=0; i<5; i++) {
tally[nums[i]] += 1;
}
for (i=1; i<14; i++) {
// four of a kind
if (tally[i] == 4) {
obj.innerHTML="Four of a Kind<br>25";
return 25;
}
if (tally[i] == 3) three = true;
if (tally[i] == 2) pairs += 1;
}
// full house
if (three && pairs == 1) {
obj.innerHTML="Full House<br>8";
return 8;
}
// two pair
if (pairs == 2) {
obj.innerHTML="Two Pair<br>2";
return 2;
}
// three of a kind
if (three) {
obj.innerHTML="Three of a Kind<br>3";
return 3;
}
// just a pair
if (pairs == 1) {
obj.innerHTML="Pair<br>1";
return 1;
}
// nothing
obj.innerHTML="No Score<br>0";
return 0;
// end AddScore()
}
// game over - final score
function EndGame() {
stat=document.getElementById("status");
stat.innerHTML="<b>Game Over</b>";
}
// make a filename for an image, given Card object
function fname() {
return this.num + this.suit + ".gif";
}
// constructor for Card objects
function Card(num,suit) {
this.num = num;
this.suit = suit;
this.fname = fname;
}
// event handlers to start game
window.onload=InitGame;
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