var?me?=?true;
var?chessBoard?=?[];
for(var?i=?0;i<15;i++){
	chessBoard[i]?=?[];
	for(var?j?=?0;j<15;j++){
		chessBoard[i][j]?=?0;
	}
}

//劃線
var?chess?=?document.getElementById('chess');
var?context?=?chess.getContext('2d');


context.strokeStyle?=?"#bbb";//棋盤線的顏色

function?drawChessBoard(){
for(var?i?=?0;?i<15;i++){
//	//棋盤橫線
	context.moveTo(15+i*30,15);
	context.lineTo(15?+?i*30,?435);
	context.stroke();
	//棋盤豎線
	context.moveTo(15,15+i*30);
	context.lineTo(435,?15?+?i*30);
	context.stroke();
}}
//水印
	var?logo?=?new?Image();
	logo.src?=?"img/logo.png";
	logo.onload?=?function(){
	context.drawImage(logo,0,0,450,450);
	drawChessBoard();
}

//棋子??i?j?是棋子的坐標??me判斷是黑棋白棋
function?oneStep(i,j,me){
	context.beginPath();//開始路徑?
	context.arc(15+i*30,15+j*30,13,0,2*Math.PI);//圓的基本信息
	context.closePath();//結束路徑
	var?gradient?=?	context.createRadialGradient(15+i*30+2,15+i*30-2,13,15+i*30+2,15+i*30-2,0);
	if(me){
		gradient.addColorStop(0,"#0a0a0a");
		gradient.addColorStop(1,"#636766");
	}else{
		gradient.addColorStop(0,"#d1d1d1");
		gradient.addColorStop(1,"#f9f9f9");
	}
	context.fillStyle?=?gradient;
	context.fill();//填充顏色
}

//下棋子
chess.onclick?=?function(e){
	var?x?=?e.offsetX;
	var?y?=?e.offsetY;
	var?i?=?Math.floor(x/30);//求棋子的坐標
	var?j?=?Math.floor(y/30);
	if(chessBoard[i][j]?==0){
		oneStep(i,j,me);
		if(me){
			chessBoard[i][j]?=?1;
		}else{
			chessBoard[i][j]?=?2;
		}
		me?!=?me;
	}
}