vt=window.document.location.href;
l=vt.length;
vid=vt.substring(l-9,l-4);
var tfieldsize=42; //needs to be an even number
var numberofpairs=tfieldsize/2
var field_contains_piece = new Array(tfieldsize+5);
var foundnumberofpairs=0; 
var first=0
var second=0
var moves=0
var UcantMove=false
var Cantstart=true
var countdown;
var countdownTimer;

for (n=1;n < (tfieldsize+1);n++)  {
	field_contains_piece[n]=Math.floor(n/2+0.5)
}

function pic_is(imgname) {
	if (!(document.images)) {
		return "bad browser";
	}
	// eval("fn=window.document.playfield.p"+imgname+".src")
	fn=document.images["p"+imgname].src
	l=fn.length
	filename=fn.substring(l-5,l)
	return filename
}

function renderCountdown() {
	var	digit, blanking, tmp;

	blanking = true;
	tmp = countdown;
	digit = Math.floor(tmp / 1000);
	tmp = tmp - (digit * 1000);
	if(digit != 0 || !blanking) {
		blanking = false;
		document.images['ctr3'].src = "images/digits/"+digit+".jpg";
	}
	digit = Math.floor(tmp / 100);
	tmp = tmp - (digit * 100);
	if(digit != 0 || !blanking) {
		blanking = false;
		document.images['ctr2'].src = "images/digits/"+digit+".jpg";
	}
	digit = Math.floor(tmp / 10);
	tmp = tmp - (digit * 10);
	if(digit != 0 || !blanking) {
		blanking = false;
		document.images['ctr1'].src = "images/digits/"+digit+".jpg";
	}
	digit = tmp;
	document.images['ctr0'].src = "images/digits/"+digit+".jpg";
}

function doCountdown() {
	if(countdownTimer) {
		clearTimeout(countdownTimer);
		countdownTimer = 0;
	}
	if(countdown) {
		countdown--;
		renderCountdown();
		countdownTimer = setTimeout("doCountdown()", 100);
	} else {
		gameover();
	}
}

function display_piece(piec) {
	eval("window.document.playfield.p"
		+piec+".src='images/"+field_contains_piece[piec]+".gif'")
}
	
function hide_piece(piec) {
	eval("window.document.playfield.p"+piec+".src='images/0.jpg'")
}
	
function hide() {
	UcantMove=false
	hide_piece(first)
	hide_piece(second)
	second=0
	first=0
}
	
function clickon(field) {
	if (UcantMove ||Cantstart) return;
	if (!(pic_is(field)=="0.jpg")) return;
	display_piece(field)
	if (first==0 || field==first) {
		first=field;
		return;
	}
	UcantMove=true
	second=field
	moves++
	if(field_contains_piece[first]!=field_contains_piece[second]) {
		setTimeout("hide()",1500)
		return;
	}
	first=0
	second=0
	foundnumberofpairs++
	if (foundnumberofpairs==numberofpairs) {
		gameover();
	}
	UcantMove=false
}

function gameover() {
	clearTimeout(countdownTimer);
	countdownTimer = 0;

	window.open("HighScoreNew.php?gamename=memory&score="+countdown,
		"HighScore","Width=300,Height=400");

}
	
function randomise() {
	var	tmp, swaptemp;

	for (n=1;n<(tfieldsize+1);n++) {
		tmp=Math.floor(Math.random()*tfieldsize+1)
		swaptemp=field_contains_piece[tmp];
		field_contains_piece[tmp]=field_contains_piece[n];
		field_contains_piece[n]=swaptemp;
	}
}
	
function newgame() {
	foundnumberofpairs=0; //reset in init
	countdown = 2111;
	doCountdown();
	first=0
	second=0
	moves=0
	for (n=1;n<(tfieldsize+1);n++) {
		field_contains_piece[n]=Math.floor(n/2+0.5);
		hide_piece(n);
	}
	randomise()
	Cantstart=false
	UcantMove=false
	
	var msg
	msg = "Welcome to Memory! Can you find all the pairs?\n"
	msg = msg + "Click OK to find out!"
	alert(msg);	
}

a = new Image(80, 80)
a.src="images/0.jpg" 
b = new Image(80, 80)
b.src="images/1.gif" 
c = new Image(80, 80)
c.src="images/2.gif" 
d = new Image(80, 80)
d.src="images/3.gif" 
e = new Image(80, 80)
e.src="images/4.gif" 
f = new Image(80, 80)
f.src="images/5.gif" 
g = new Image(80, 80)
g.src="images/6.gif" 
h = new Image(80, 80)
h.src="images/7.gif" 
i = new Image(80, 80)
i.src="images/8.gif" 
j = new Image(80, 80)
j.src="images/9.gif" 
k = new Image(80, 80)
k.src="images/10.gif" 
l = new Image(80, 80)
l.src="images/11.gif" 
m = new Image(80, 80)
m.src="images/12.gif" 
n = new Image(80, 80)
n.src="images/13.gif" 
o = new Image(80, 80)
o.src="images/14.gif" 
p = new Image(80, 80)
o.src="images/15.gif"
q = new Image(80, 80)
q.src="images/16.gif"
r = new Image(80, 80)
r.src="images/17.gif"
s = new Image(80, 80)
s.src="images/18.gif"
t = new Image(80, 80)
t.src="images/19.gif"
u = new Image(80, 80)
u.src="images/20.gif"
v = new Image(80, 80)
v.src="images/21.gif"
w = new Image(80, 80)
w.src="images/22.gif"
x = new Image(80, 80)
x.src="images/23.gif"
y = new Image(80, 80)
y.src="images/24.gif"