//用于画地图的方块类
        function Rect(x,y,size,context) {
            this.x = x;
            this.y = y;
            this.size = size;
            //是否着色的标志，由游戏控制类来改写
            this.issetcolor = false;
            this.color = "";
            this.context = context;
        }
        //画边框，用于画地图
        Rect.prototype.strokerect = function (sColor) {
            this.context.strokeStyle = sColor;
            this.context.strokeRect(this.x * this.size,this.y * this.size,this.size,this.size);
        }
        //填充颜色
        Rect.prototype.fillrect = function (sColor) {
            this.context.fillStyle = sColor;
            this.context.fillRect(this.x * this.size + 1,this.y * this.size + 1,this.size - 2, this.size - 2);
            this.color = sColor;
        }
        //清除颜色
        Rect.prototype.clearrect = function () {
            this.context.clearRect(this.x * this.size + 1,this.y * this.size + 1,this.size - 2,this.size - 2);
        }  
        //地图类
        function map(RectSize,color,canvas) {
            this.width = canvas.width;
            this.height = canvas.height;
            this.RectSize = RectSize; //方块边长
            this.backgroundcolor = color;
            this.aMapArray = null;
            this.ctx = canvas.getContext("2d");
            this.born();
        }
        //地图由若干只有边框的方块组成
        map.prototype.born = function () {
            var i; var j;
            var xCount;
            var yCount;
            xCount = this.width / this.RectSize;
            yCount = this.height / this.RectSize;
            this.aMapArray = new Array();
            for (i = 0; i < xCount; i++) {
                this.aMapArray[i] = new Array();
                for (j = 0; j < yCount; j++) {
                    this.aMapArray[i][j] = new Rect(i,j,this.RectSize,this.ctx);
                    this.aMapArray[i][j].strokerect(this.backgroundcolor);
                    this.aMapArray[i][j].fillrect(this.backgroundcolor);
                }
            }
        }
        //地图刷新
        map.prototype.refresh = function () {
            var xCount;
            var yCount;
            xCount = this.width / this.RectSize;
            yCount = this.height / this.RectSize;
            for (var i = 0; i < xCount; i++) {
                for (var j = 0; j < yCount; j++) {
                    this.aMapArray[i][j].fillrect("White");
                    t