var x = "http://www.georgina-walker.com/images/tictactoe/x.jpg";
var o = "http://www.georgina-walker.com/images/tictactoe/o.jpg";
var blank = "http://www.georgina-walker.com/images/tictactoe/blank.jpg";

var pause = 0;
var all = 0;
var a = 0;
var b = 0;
var c = 0;
var d = 0;
var e = 0;
var f = 0;
var g = 0;
var h = 0;
var i = 0;
var temp="";
var ok = 0;
var cf = 0;
var choice=9;
var aRandomNumber = 0;
var comp = 0; 
var t = 0;
var wn = 0;
var ls = 0;
var ts = 0;

function logicOne() {
	if ((a==1)&&(b==1)&&(c==1)) all=1;
	if ((a==1)&&(d==1)&&(g==1)) all=1;
	if ((a==1)&&(e==1)&&(i==1)) all=1;
	if ((b==1)&&(e==1)&&(h==1)) all=1;
	if ((d==1)&&(e==1)&&(f==1)) all=1;
	if ((g==1)&&(h==1)&&(i==1)) all=1;
	if ((c==1)&&(f==1)&&(i==1)) all=1;
	if ((g==1)&&(e==1)&&(c==1)) all=1;
	if ((a==2)&&(b==2)&&(c==2)) all=2;
	if ((a==2)&&(d==2)&&(g==2)) all=2;
	if ((a==2)&&(e==2)&&(i==2)) all=2;
	if ((b==2)&&(e==2)&&(h==2)) all=2;
	if ((d==2)&&(e==2)&&(f==2)) all=2;
	if ((g==2)&&(h==2)&&(i==2)) all=2;
	if ((c==2)&&(f==2)&&(i==2)) all=2;
	if ((g==2)&&(e==2)&&(c==2)) all=2;
	if ((a != 0)&&(b != 0)&&(c != 0)&&(d != 0)&&(e != 0)&&(f != 0)&&(g != 0)&&(h != 0)&&(i != 0)&&(all == 0)) all = 3;
} 
function logicTwo() {
	if ((a==2)&&(b==2)&&(c== 0)&&(temp=="")) temp="C";
	if ((a==2)&&(b== 0)&&(c==2)&&(temp=="")) temp="B";
	if ((a== 0)&&(b==2)&&(c==2)&&(temp=="")) temp="A";
	if ((a==2)&&(d==2)&&(g== 0)&&(temp=="")) temp="G";
	if ((a==2)&&(d== 0)&&(g==2)&&(temp=="")) temp="D";
	if ((a== 0)&&(d==2)&&(g==2)&&(temp=="")) temp="A";
	if ((a==2)&&(e==2)&&(i== 0)&&(temp=="")) temp="I";
	if ((a==2)&&(e== 0)&&(i==2)&&(temp=="")) temp="E";
	if ((a== 0)&&(e==2)&&(i==2)&&(temp=="")) temp="A";
	if ((b==2)&&(e==2)&&(h== 0)&&(temp=="")) temp="H";
	if ((b==2)&&(e== 0)&&(h==2)&&(temp=="")) temp="E";
	if ((b== 0)&&(e==2)&&(h==2)&&(temp=="")) temp="B";
	if ((d==2)&&(e==2)&&(f== 0)&&(temp=="")) temp="F";
	if ((d==2)&&(e== 0)&&(f==2)&&(temp=="")) temp="E";
	if ((d== 0)&&(e==2)&&(f==2)&&(temp=="")) temp="D";
	if ((g==2)&&(h==2)&&(i== 0)&&(temp=="")) temp="I";
	if ((g==2)&&(h== 0)&&(i==2)&&(temp=="")) temp="H";
	if ((g== 0)&&(h==2)&&(i==2)&&(temp=="")) temp="G";
	if ((c==2)&&(f==2)&&(i== 0)&&(temp=="")) temp="I";
	if ((c==2)&&(f== 0)&&(i==2)&&(temp=="")) temp="F";
	if ((c== 0)&&(f==2)&&(i==2)&&(temp=="")) temp="C";
	if ((g==2)&&(e==2)&&(c== 0)&&(temp=="")) temp="C";
	if ((g==2)&&(e== 0)&&(c==2)&&(temp=="")) temp="E";
	if ((g== 0)&&(e==2)&&(c==2)&&(temp=="")) temp="G";
}

function logicThree() {
	if ((a==1)&&(b==1)&&(c==0)&&(temp=="")) temp="C";
	if ((a==1)&&(b==0)&&(c==1)&&(temp=="")) temp="B";
	if ((a==0)&&(b==1)&&(c==1)&&(temp=="")) temp="A";
	if ((a==1)&&(d==1)&&(g==0)&&(temp=="")) temp="G";
	if ((a==1)&&(d==0)&&(g==1)&&(temp=="")) temp="D";
	if ((a==0)&&(d==1)&&(g==1)&&(temp=="")) temp="A";
	if ((a==1)&&(e==1)&&(i==0)&&(temp=="")) temp="I";
	if ((a==1)&&(e==0)&&(i==1)&&(temp=="")) temp="E";
	if ((a==0)&&(e==1)&&(i==1)&&(temp=="")) temp="A";
	if ((b==1)&&(e==1)&&(h==0)&&(temp=="")) temp="H";
	if ((b==1)&&(e==0)&&(h==1)&&(temp=="")) temp="E";
	if ((b==0)&&(e==1)&&(h==1)&&(temp=="")) temp="B";
	if ((d==1)&&(e==1)&&(f==0)&&(temp=="")) temp="F";
	if ((d==1)&&(e==0)&&(f==1)&&(temp=="")) temp="E";
	if ((d==0)&&(e==1)&&(f==1)&&(temp=="")) temp="D";
	if ((g==1)&&(h==1)&&(i==0)&&(temp=="")) temp="I";
	if ((g==1)&&(h==0)&&(i==1)&&(temp=="")) temp="H";
	if ((g==0)&&(h==1)&&(i==1)&&(temp=="")) temp="G";
	if ((c==1)&&(f==1)&&(i==0)&&(temp=="")) temp="I";
	if ((c==1)&&(f==0)&&(i==1)&&(temp=="")) temp="F";
	if ((c==0)&&(f==1)&&(i==1)&&(temp=="")) temp="C";
	if ((g==1)&&(e==1)&&(c==0)&&(temp=="")) temp="C";
	if ((g==1)&&(e==0)&&(c==1)&&(temp=="")) temp="E";
	if ((g==0)&&(e==1)&&(c==1)&&(temp=="")) temp="G";
}

function clearOut() {
	document.game.you.value="0";
	document.game.computer.value="0";
	document.game.ties.value="0";
}

function checkSpace() {
	if ((temp=="A")&&(a==0)) {
		ok=1;
		if (cf==0) a=1;
		if (cf==1) a=2;
	}
	if ((temp=="B")&&(b==0)) {
		ok=1;
		if (cf==0) b=1;
		if (cf==1) b=2;
	}
	if ((temp=="C")&&(c==0)) {
		ok=1;
		if (cf==0) c=1;
		if (cf==1) c=2;
	}
	if ((temp=="D")&&(d==0)) {
		ok=1;
		if (cf==0) d=1;
		if (cf==1) d=2;
	}
	if ((temp=="E")&&(e==0)) {
		ok=1;
		if (cf==0) e=1;
		if (cf==1) e=2;
	}
	if ((temp=="F")&&(f==0)) {
		ok=1
		if (cf==0) f=1;
		if (cf==1) f=2;
	}
	if ((temp=="G")&&(g==0)) {
		ok=1
		if (cf==0) g=1;
		if (cf==1) g=2;
	}
	if ((temp=="H")&&(h==0)) {
		ok=1;
		if (cf==0) h=1;
		if (cf==1) h=2;
	}
	if ((temp=="I")&&(i==0)) {
		ok=1;
		if (cf==0) i=1; 
		if (cf==1) i=2; 
	}
}
function yourChoice(chName) {
	pause = 0;
	if (all!=0) ended();
	if (all==0) {
		cf = 0;
		ok = 0;
		temp=chName;
		checkSpace();
		if (ok==1) {
			document.images[chName].src = x;
		}
		if (ok==0)taken();
		process();
		if ((all==0)&&(pause==0)) myChoice();
	}
}

function taken() {
	alert("That square is already occupied.  Please select another square.")
	pause=1;
}

function myChoice() {
	temp="";
	ok = 0;
	cf=1;
	logicTwo();
	logicThree();
	checkSpace();
	while(ok==0) {
		aRandomNumber=Math.random()
		comp=Math.round((choice-1)*aRandomNumber)+1;
		if (comp==1) temp="A";
		if (comp==2) temp="B";
		if (comp==3) temp="C";
		if (comp==4) temp="D";
		if (comp==5) temp="E";
		if (comp==6) temp="F";
		if (comp==7) temp="G";
		if (comp==8) temp="H";
		if (comp==9) temp="I";
		checkSpace();
	}
	document.images[temp].src= o;
	process();
}

function ended() {
	alert("The game has already ended. To play a new game click the Play Again button.")
}

function process() {
	logicOne();
	if (all==1){ alert("You won, congratulations!"); wn++; }
	if (all==2){ alert("Gotcha!  I win!"); ls++; }
	if (all==3){ alert("We tied."); ts++; }
	if (all!=0) {
		document.game.you.value = wn;
		document.game.computer.value = ls;
		document.game.ties.value = ts;
	}
}

function playAgain() {
	all = 0;
	a = 0;
	b = 0;
	c = 0;
	d = 0;
	e = 0;
	f = 0;
	g = 0;
	h = 0;
	i = 0;
	temp="";
	ok = 0;
	cf = 0;
	choice=9;
	aRandomNumber = 0;
	comp = 0; 
	document.images.A.src= blank;
	document.images.B.src= blank;
	document.images.C.src= blank;
	document.images.D.src= blank;
	document.images.E.src= blank;
	document.images.F.src= blank;
	document.images.G.src= blank;
	document.images.H.src= blank;
	document.images.I.src= blank;
	if (t==0) { t=2; myChoice(); }
	t--;
}