JavaScript 版俄罗斯方块

用JavaScript 写的俄罗斯方块, 实现了几个比较简单的功能: 自定义按键, 设置初始速度,难度和方块,换肤功能。

布局用的Div+Css

演示地址：http://58.61.155.48:818/Tetris.html  
下载：http://download.csdn.net/source/430506
         http://58.61.155.48:818/Tetris.rar

程序主要用了三个类, 窗口类、菜单类、游戏类和一个基类。

1.基类, 定义了一些常用属性和函数.

//声明命名空间
var Freewind = {};
//基类
Freewind.Base = function(){
    //浏览器
    this._isIE = document.all ? true : false;
    
    //对象索引
    this._nIndex = 0;

    //大小
    this._nLeft = 0;
    this._nTop = 0;
    this._nWidth = DEF_WIN_WIDTH;
    this._nHeight = DEF_WIN_HEIGHT;
    
    //对象ID前缀
    this._sPrefix = "FW_";
    
    //文档对象
    this.DOM = document;
    
    //父对象
    this._parent = document.body;
    
    //创建Div
    this._createDiv = function(sDivID){
        var obj = this.DOM.createElement("div");
        obj.setAttribute("id", this._sPrefix + sDivID + this._nIndex);
        obj.className = this._sPrefix + sDivID;
        return obj;
    };
    this._$ = function(o){
        return document.getElementById(o);
    };
    //获取元素绝对位置
    this._getOffset = function(obj){
        var x = 0, y = 0;
        do{
            x += obj.offsetLeft;
            y += obj.offsetTop;
            
            obj = obj.offsetParent;
        }while(obj);
        return {x:x, y:y};
    };
};

2.窗口类,　继承Base类, 主要负责窗口的移动，关闭等

有２种显示方式:

1)可以显示为普通窗口 调用方式 showWindow();

2)也可以显示为模态对话框 调用方式 showDialog();

//窗口类
Freewind.Window = function(){
    Freewind.Base.apply(this, arguments);
    
    this._nIndex = this._getIndex();
    
    //移动相关
    this._bMouseDown = false;
    this._nEventX = 0;
    this._nEventY = 0;
    
    //ModlessDialog
    this._nAddzIndex = 0;

    //对象
    this.Window = null;
    this._Title = null;
    this._Body = null;
    this._CloseButton = null;
    this._Container = null;
    this._OverLayer = null;
    
    this._init();
}

Freewind.Window.prototype = {
    //Private method
    _initObject : function(){
        this.Window = this._createDiv("Window");
        this._Container = this._createDiv("Container");
        this._Title = this._createDiv("Title");
        this._CloseButton = this._createDiv("CloseButton");
        this._Body = this._createDiv("Body");
        
        this.Window.appendChild(this._Container);
        this._Container.appendChild(this._Title);
        this._Container.appendChild(this._Body);
        this._Container.appendChild(this._CloseButton);
        
        this._CloseButton.innerHTML = "<span>X</span>";
    },
    _initPosition : function(){
        var left, top, titleHeight;
        titleHeight = 30;
        
        this.Window.style.cssText = "position: relative; left:" + this._nLeft + "px; top:" + this._nTop + "px; width:" + this._nWidth + "px; height:" + this._nHeight + "px; z-index:90;";
        
        this._Title.style.cssText = "position: absolute; width:100%; height:" + titleHeight + "px; line-height:" + titleHeight + "px; cursor:move; z-index:11; font-size:12px;";
        
        var t = (titleHeight - 19) / 2 ;
        this._CloseButton.style.cssText = "position: absolute; right:8px; width:20px; height:19px; top:" + t + "px; text-align:center; z-index:12; cursor:pointer;";
                
        h = this._nHeight - titleHeight - 1 ;
        this._Body.style.cssText = "position:absolute; left:0px; top:" + titleHeight + "px; width:100%;     z-index:11; height:" + h + "px;";    
    },
    _setOpacity : function(n){
        this.Window.style.MozOpacity = n / 100;
        if(n == 100){
            this.Window.style.filter = "";
        }else{
            this.Window.style.filter = "alpha(opacity=" + n + ")";    
        }
    },
    _setzIndex : function(str){
        if(str == "Top"){
            this.Window.style.zIndex = 100 + this._nAddzIndex;    
        }else if(str == "OverLayer"){
            this.Window.style.zIndex = 99 + this._nAddzIndex;
        }else{
            this.Window.style.zIndex = 90 + this._nAddzIndex;
        }
    },
    _mouseDown : function(oEvent){
        oEvent = oEvent || window.event;
        this._setzIndex("Top");
        this._setOpacity(50);
        
        if(this._isIE){
            this._nEventX = oEvent.clientX + document.documentElement.scrollLeft;
            this._nEventY = oEvent.clientY + document.documentElement.scrollTop;
        }else{
            this._nEventX = oEvent.pageX;
            this._nEventY = oEvent.pageY;
        }
        this._bMouseDown = true;
        if(this._isIE){
            this._Title.setCapture();
        }else{
            window.captureEvents(Event.MOUSEMOVE | Event.MOUSEUP);
        }
    },
    _mouseMove : function(oEvent){
        if(this._bMouseDown){
            var x, y, ex, ey;
            oEvent = oEvent || window.event;
            if(this._isIE){
                ex = oEvent.clientX + document.documentElement.scrollLeft;
                ey = oEvent.clientY + document.documentElement.scrollTop;
            }else{
                ex = oEvent.pageX;
                ey = oEvent.pageY;
            }
            x = this._nEventX - ex;
            y = this._nEventY - ey;
            
            this.Window.style.left = parseInt(this.Window.style.left) - x + "px";
            this.Window.style.top = parseInt(this.Window.style.top) - y + "px";
            
            this._nEventX = ex;
            this._nEventY = ey;
        }            
    },
    _mouseUp : function(){
        this._setzIndex("Normal");
        this._setOpacity(100);
        
        this._bMouseDown = false;
        if(this._isIE){
            this._Title.releaseCapture();
        }else{
            window.releaseEvents(Event.MOUSEMOVE | Event.MOUSEUP);
        }
    },
    _onclick : function(oEvent){        
        if(this._nAddzIndex > 0){
            this.closeDialog();
        }else{
            this.closeWindow();
        }
    },
    _initEvent : function(){
        var objThis = this;
        this._Title.onmousedown = function(oEvent){
            objThis._mouseDown(oEvent);
        };
        this._Title.onmousemove = function(oEvent){
            objThis._mouseMove(oEvent);
        };    
        this._Title.onmouseup = function(oEvent){
            objThis._mouseUp(oEvent);
        };
        this._CloseButton.onclick = function(oEvent){
            objThis._onclick(oEvent);
        };
    },
    _init : function(){
        this._initObject();
        this._initEvent();
    },
    _getIndex : function(){
        if(this.DOM.nWndCount){
            return ++this.DOM.nWndCount;
        }else{
            this.DOM.nWndCount = 1;
            return this.DOM.nWndCount;
        }
    },
    _showOverLayer : function(){
        var o;
        if(this._OverLayer == null){
            this._OverLayer = this._createDiv("OverLayer");
        }
        o = this._OverLayer;
        this._parent.appendChild(o);
        //o.style.backgroundColor = "#FF0000";
        o.style.width = document.documentElement.clientWidth + "px";
        o.style.height = document.documentElement.clientHeight + "px";
        
    },
    _hideOverLayer : function(){
        this._parent.removeChild(this._OverLayer);
    },
    //public method
    moveTo : function(x, y){
        this.Window.style.left = x + "px";
        this.Window.style.top = y + "px";
        
        this._nLeft = x;
        this._nTop = y;
    },
    setSize : function(wid, hei){    
        this._nWidth = wid;
        this._nHeight = hei;
        this.Window.style.width = wid + "px";
        this.Window.style.height = hei + "px";
        
        this._Body.style.height = hei - 30 - 1 + "px";
    },
    setDefaultSkin : function(){
        this._initPosition();
        //窗口
        this.Window.style.border = "1px solid #76c2eb";
        
        this._Title.style.backgroundColor = "#d4eeff";
        this._Title.style.filter = " progid:DXImageTransform.Microsoft.gradient(startcolorstr=#d4eeff,endcolorstr=#fcfdff,gradientType=0);"
        this._Title.style.color = "#004b85";
        this._Title.style.fontFamily = "Times New Roman";
        
        this._Body.style.borderTop = "1px solid #76c2eb";
        this._Body.style.backgroundColor = "#F8F8F8";
        
        //this._CloseButton.innerHTML = "<span style='font-size:14px;color:#004b85;font-family:Arial;font-weight:bold;'>X</span>";
    },
    setTitle : function(str){
        this._Title.innerHTML = "&nbsp;&nbsp;" + str;
    },
    setBody : function(str){
        this._Body.innerHTML = str;
    },
    setRect : function(left, top){
        this._nLeft = left;
        this._nTop = top;
        if(arguments[2]) this._nWidth = arguments[2];
        if(arguments[3]) this._nHeight = arguments[3];
        
        this.moveTo(left, top);
        if(arguments.length > 3){
            this.setSize(this._nWidth, this._nHeight);
        }
    },
    setParent : function(obj){
        this._parent = obj;
        
        //if(this._isShow){
        //    this._parent.appendChild(this.Window);
        //}
    },
    isShow : function(){ return this._isShow; },
    appendChild : function(obj){
        this._Body.appendChild(obj);
    },
    showWindow : function(){
        if(!this._isShow){
            this._parent.appendChild(this.Window);
            this._isShow = true;
        }
        if(arguments.length > 0){
            para = arguments[0];
            if(para.position == "center"){
                var wid = document.documentElement.clientWidth;
                var hei = document.documentElement.clientHeight;
                
                var x = (wid - this.Window.offsetWidth) / 2;
                var y = (hei - this.Window.offsetHeight) / 2;
                //alert(x + "-" + y);
                this.moveTo(x, y);
            }
        }
    },
    closeWindow : function(){
        this._isShow = false;
        this.Window.innerHTML = "";
        this._parent.removeChild(this.Window);
    },
    hideWindow : function(){
        this._isShow = false;
        this._parent.removeChild(this.Window);
    },
    showDialog : function(){
        this._nAddzIndex = 15;
        var objParent = null;
        if(arguments.length > 0) objParent = arguments[0];
        this._showOverLayer();
        this._setzIndex("Top");
        this.showWindow();
        
        if(objParent != null){ // set position
            var pt = this._getOffset(objParent);
            //alert(pt.x + "-" + pt.y + "-" + objParent.offsetHeight + "-" + objParent.offsetWidth);
            var x = (objParent.offsetWidth - this._nWidth) / 2 + pt.x;
            var y = (objParent.offsetHeight - this._nHeight) / 2 + pt.y;
            this.moveTo(x, y);
        }
    },
    closeDialog : function(){
        this._nAddzIndex = 15;
        this._hideOverLayer();
        this._Body.childNodes[0].style.display = "none";
        document.body.appendChild(this._Body.childNodes[0]);
        this.hideWindow();
    },
    toString : function(){
        return this.Window.innerHTML;
    }
};

3.菜单类，继承Base类。实例化时以字符串形式传入回调函数名.

//菜单类
Freewind.Menu = function(sCallBack){
    Freewind.Base.apply(this, arguments);
    //回调函数
    this._sCallBack = sCallBack;
    this._nIndex = this._getIndex();
    //菜单字符数组
    this._Menu = [];
    //对象
    this.Menu = null;
    this._mainMenu = null;
    this._subMenu = null;
    
    //显示点击菜单
    this._isShow = false;
    this._prevMenu = null;
    
    this._init();
};

Freewind.Menu.prototype = {
    _getIndex : function(){
        if(this.DOM.nMenuCount){
            return ++this.DOM.nMenuCount;
        }else{
            this.DOM.nMenuCount = 1;
            return this.DOM.nMenuCount;
        }
    },
    _init : function(){
        this.Menu = this._createDiv("Menu");
        this._mainMenu = this._createDiv("MainMenu");
        this._subMenu = this._createDiv("SubMenu");
        this._subMenu.style.display = "none";
        
        this.Menu.appendChild(this._mainMenu);
        this.Menu.appendChild(this._subMenu);
    },
    _initMenu : function(){
        var self = this;
        this._mainMenu.innerHTML = "";
        this._subMenu.innerHTML = "";
        
        for(var i=0; i<this._Menu.length; i++){
            tmpmenu = this._createDiv("MainMenuItem"+i)
            tmpmenu.innerHTML = this._Menu[i][0];
            tmpmenu.nIndex = i;
            tmpmenu.onmouseover = function(){
                self._onmouseover(this);
            }
            tmpmenu.onmouseout = function(){
                self._onmouseout(this);
            }
            tmpmenu.onclick = function(oEvent){
                self._onclick(oEvent, this);
            }
            this._mainMenu.appendChild(tmpmenu);
        }
    },
    _onmouseover : function(obj){
        if(this._prevMenu){
            this._onmouseout(this._prevMenu, true);
        }
        if(this._isShow){
            obj.className = "click";
            
            this._showMenu(obj);
        }else{    
            obj.className = "hover";
        }
    },
    _onmouseout : function(obj){
        if((!this._isShow || arguments.length > 1) && obj && obj.style){
            obj.className = "out";
        }
    },
    _onclick : function(oEvent, obj){
        this._isShow = true;        
        
        oEvent = window.event || oEvent;
        if(this._isIE){
            oEvent.cancelBubble = true;
        }else{
            oEvent.stopPropagation();
        }
        
        this._onmouseover(obj);
    },
    _showMenu: function(obj){
        this._prevMenu = obj;
        
        //show submenu
        var n = obj.nIndex;
        var html = [];
        html.push("<ul>");
        for(var i=1; i<this._Menu[n].length; i++){
            if(this._Menu[n][i] != "-"){
                html.push("<li class='MenuItem'><a hideFocus='hideFocus' href='javascript:" + this._sCallBack + "(" + n + "," + i + ");'>" + this._Menu[n][i] + "</a></li>");
            }else{
                html.push("<li class='SepItem'><div class='SepLine'></div></li> ");
            }
        }
        html.push("</ul>");
        //位置
        this._subMenu.style.top = obj.offsetHeight + 3 + "px";
        this._subMenu.style.left = obj.offsetLeft + "px";
        this._subMenu.style.display = "";
        this._subMenu.innerHTML = html.join("");
    },
    setMenu : function(m){
        this._Menu = m;
        this._initMenu();
    },
    setHidden : function(){
        this._isShow = false;
        this._subMenu.style.display = "none";
        this._onmouseout(this._prevMenu, true);
    },
    hideMenu : function(){
        this._isShow = false;
    }
};

4.游戏类，继承Base类。主要负责游戏相关操作，设置按键，速度，难度等。

//游戏类
Freewind.Tetris = function(){
    Freewind.Base.apply(this, arguments);
    
    this._nIndex = this._getIndex();
    
    this._map = null;
    this._nextMap = null;
    
    this._nMaxRow = 20;
    this._nMaxCol = 10;
    
    this._nCurRow = 0;
    this._nCurCol = 4;
    this._nCurNum = 0;
    this._nCurShape = 0;
    
    this._nNextRow = 1;
    this._nNextCol = 1;
    this._nNextNum = 0;
    this._nNextShape = 0;
    
    this._curBoxs = [];
    this._nextBoxs = [];
    this._Keys = {};
    
    this._gameState = "ready";
    
    this._nNum = 7; // or 15
    this._Boxs = [ ["060102","601020"],
                    ["606101"],
                    ["600601","600110","060110","600610"],
                    ["666001","610110"],
                    ["606106","600111"],
                    ["601011","060116","666010","610601"],
                    ["601016","660601","606110","060111"],
                    [""],
                    ["60","01"],
                    ["6010","0601"],
                    ["0610","6006","6001","0110"],
                    ["60060110"],
                    ["66610601","60611011","06011611","66601610"],
                    ["66606110","61060111","60161011","66060116"],
                    ["66060111","60611610"] ]
    
    this._nLines = 0;
    this._nScore = 0;
    this._nSpeed = 0;
    this._nLevel = 0;
    
    this._nInitSpeed = 0;
    this._nInitLevel = 0;
    this._nTimerID = 0;
    
    this._nDelay = 1000;
    this._nInterval = 95;
    
    this._init();
};
Freewind.Tetris.prototype = {
    _getIndex : function(){
        if(this.DOM.nTetrisCount){
            return ++this.DOM.nTetrisCount;
        }else{
            this.DOM.nTetrisCount = 1;
            return this.DOM.nTetrisCount;
        }
    },
    _init : function(){
        this.Tetris = this._createDiv("Tetris");
        var html = [];
        html.push("<div class='FW_Te_Left'>");
        html.push("       <div id='FW_GameArea-1' class='FW_GameArea'></div>");
        html.push("</div>");
        html.push("<div class='FW_Te_Right'>");
        html.push("       <div id='FW_NextBox-1' class='FW_NextBox'></div>");
        html.push("    <ul class='FW_Prototype'>");
        html.push("           <li>行数：</li>");
        html.push("        <li><input type='text' id='FW_Lines-1' name='FW_Lines-1' value='0' readonly = 'readonly' /></li>");
        html.push("        <li>分数：</li>");
        html.push("        <li><input type='text' id='FW_Score-1' name='FW_Score-1' value='0' readonly = 'readonly' /></li>");
        html.push("        <li>速度：</li>");
        html.push("        <li><input type='text' id='FW_Speed-1' name='FW_Speed-1' value='0' readonly = 'readonly' /></li>");
        html.push("        <li>难度：</li>");
        html.push("        <li><input type='text' id='FW_Level-1' name='FW_Level-1' value='0' readonly = 'readonly' /></li>");
        html.push("    </ul>");
        html.push("</div>");
        
        var str = html.join("");
        str = str.replace(/-1/g, this._nIndex);
        this.Tetris.innerHTML = str;
        this._parent.appendChild(this.Tetris);
        
        var i = this._nIndex;
        this._GameArea = this._$("FW_GameArea" + i);
        this._NextBox = this._$("FW_NextBox" + i);
        this._Lines = this._$("FW_Lines" + i);
        this._Score = this._$("FW_Score" + i);
        this._Speed = this._$("FW_Speed" + i);
        this._Level = this._$("FW_Level" + i);
        
        this._createMap();
        this._setDefaultKey();
    },
    _setDefaultKey : function(){
        this._Keys = this._getDefaultKey();
    },
    _getDefaultKey : function(){
        return {
            left: 37,
            right: 39,
            down: 40,
            cshape: 32
        };
    },
    _createMap : function(){
        var html = [];
        html.push("<table width='100%' cellpadding='0' onselectstart='return false;' cellspacing='0' id='FW_Table" + this._nIndex + "' >");
        for(var i=0; i<this._nMaxRow; i++){
            html.push("<tr>");
            for(var j=0; j<this._nMaxCol; j++){
                html.push("<td class='FW_HideBox'>&nbsp;</td>");
            }
            html.push("</tr>");
        }
        html.push("</table>");
        this._GameArea.innerHTML = html.join("");
        this._map = this._$("FW_Table" + this._nIndex);
        
        var next = [];
        next.push("<table width='100%' cellpadding='0' onselectstart='return false;' cellspacing='0' id='FW_Table2" + this._nIndex + "' >");
        for(var i=0; i<4; i++){
            next.push("<tr>");
            for(var j=0; j<4; j++){
                next.push("<td class='FW_HideBox2'>&nbsp;</td>");
            }
            next.push("</tr>");
        }
        next.push("</table>");
        this._NextBox.innerHTML = next.join("");
        this._nextMap = this._$("FW_Table2" + this._nIndex);
    },
    _getRandom : function(nMin, nMax){
        return parseInt(Math.random()*(nMax-nMin)) + nMin;
    },
    _clearTimer : function(){
        if(this._nTimerID > 0){
            clearTimeout(this._nTimerID);
            this._nTimerID = 0;
        }
    },
    _resetData : function(){    
        this._clearTimer();
        
        this._nLines = 0;
        this._nScore = 0;
        this._nSpeed = 0;
        this._nLevel = 0;
        
        this._gameState = "start";
        
        for(var i=0; i<this._nMaxRow; i++){
            for(var j=0; j<this._nMaxCol; j++){
                this._map.rows[i].cells[j].className = "FW_HideBox";
                this._map.rows[i].cells[j].isHave = false;
            }
        }
        
        for(var i=0; i<4; i++){
            for(var j=0; j<4; j++){
                this._nextMap.rows[i].cells[j].className = "FW_HideBox2";
                this._nextMap.rows[i].cells[j].isHave = false;
            }
        }
    },
    _parseBox : function(row, col, num, shape){
        var boxs = this._Boxs[num][shape] + "00";
        var len = boxs.length;
        var ret = [];
        
        for(var i=0; i<len; i+=2){
            r = parseInt(boxs.charAt(i));
            c = parseInt(boxs.charAt(i+1));
            if(r >= 6) r -= 7;
            if(c >= 6) c -= 7;
            
            r += row;
            c += col;
            ret.push(r);
            ret.push(c);
        }    
        return ret;
    },
    _createBox : function(){
        this._nCurRow = 1;
        this._nCurCol = 4;
        this._nCurNum = this._nNextNum;
        this._nCurShape = this._nNextShape;
        this._curBoxs = this._parseBox(this._nCurRow, this._nCurCol, this._nCurNum, this._nCurShape);
        
        var n = this._getRandom(0, this._nNum);
        var s = this._getRandom(0, 4);
        if(s >= this._Boxs[n].length){
            if(this._Boxs[n].length == 1){
                s = 0;
            }else{
                s -= 2;
            }
        }    
        this._nNextNum = n;
        this._nNextShape = s;
        this._nextBoxs = this._parseBox(this._nNextRow, this._nNextCol, n, s);
    },
    _setBoxStyle : function(obj, row, col, clsname){
        if(row >= 0 && col >= 0 && row < obj.rows.length && col < obj.rows[row].cells.length){
            obj.rows[row].cells[col].className = clsname;
        }
    },
    _showBoxs : function(isGameArea, isShow){
        //class name, obj;
        var map, clsname, boxs;
        clsname = "FW_Box"; //show
        if(isGameArea){
            map = this._map;
            if(!isShow) clsname = "FW_HideBox";
            boxs = this._curBoxs;
        }else{
            map = this._nextMap;
            if(!isShow) clsname = "FW_HideBox2";
            boxs = this._nextBoxs;
        }
        for(var i=0; i<boxs.length; i+=2){
            this._setBoxStyle(map, boxs[i], boxs[i+1], clsname);
        }    
    },
    _showCurBox : function(){
        this._showBoxs(true, true);
    },
    _showNextBox : function(){
        this._showBoxs(false, true);
    },
    _setInitLevel : function(){
        var n = 5;
        for(var i=this._nInitLevel; i>0; i--){
            r = this._nMaxRow - i;
            for(var j=0; j<n; j++){
                c = this._getRandom(0, this._nMaxCol);
                this._map.rows[r].cells[c].isHave = true;
                this._map.rows[r].cells[c].className = "FW_Box";
            }
        }
    },
    _start : function(){
        this._resetData();
        this._createBox();
        this._createBox();
        this._showCurBox();
        this._showNextBox();
        
        this._showScore();
        if(this._nInitLevel > 0){
            this._setInitLevel();
        }
        this._moveDown(false);
    },
    _pause : function(){
        if(this._gameState == "start"){
            this._gameState = "pause";
        }else if(this._gameState == "pause"){
            this._gameState = "start";
        }
    },
    _stop : function(){
        this._clearTimer();
    },
    _gameOver : function(){
        alert("game over!");
    },
    _move : function(dir){
        var rr = 0, cc = 0;
        var isFound = false;
        switch(dir.toLowerCase()){
            case "left":
                cc = -1;
                break;
            case "right":
                cc = 1;
                break;
            case "down":
                rr = 1;
                break;
        }
        for(var i=0; i<this._curBoxs.length; i+=2){
            r = this._curBoxs[i] + rr;
            c = this._curBoxs[i+1] + cc;
            if(r >= 0){
                if(r >= this._nMaxRow || c < 0 || c >= this._nMaxCol || this._map.rows[r].cells[c].isHave){
                    isFound = true;
                    break;
                }
            }
        }
        if(!isFound){
            this._showBoxs(true, false); //hide;
            for(var i=0; i<this._curBoxs.length; i+=2){
                this._curBoxs[i] += rr;
                this._curBoxs[i+1] += cc;
            }
            this._nCurRow += rr;
            this._nCurCol += cc;
            this._showBoxs(true, true);
        }
        
        return !isFound;
    },
    _setCurBox : function(){
        for(var i=0; i<this._curBoxs.length; i+=2){
            r = this._curBoxs[i];
            c = this._curBoxs[i+1];
            if(r < 0 || this._map.rows[r].cells[c].isHave == true){
                this._gameState = "over";
                return;
            }
            this._map.rows[r].cells[c].isHave = true;
        }
    },
    _deleteRow : function(n){
        for(var i=n; i>0; i--){
            for(var j=0; j<this._nMaxCol; j++){
                if(this._map.rows[i].cells[j].isHave != this._map.rows[i-1].cells[j].isHave){
                    this._map.rows[i].cells[j].isHave = this._map.rows[i-1].cells[j].isHave;
                    this._map.rows[i].cells[j].className = this._map.rows[i-1].cells[j].className;
                }
            }
        }
    },
    _showScore : function(){
        this._Lines.value = this._nLines;
        this._Score.value = this._nScore;
        
        this._Speed.value = this._nSpeed;
        if(this._nInitSpeed > 0) this._Speed.value += " + " + this._nInitSpeed;
        
        this._Level.value = this._nLevel;
        if(this._nInitLevel > 0) this._Level.value += " + " + this._nInitLevel;
    },
    _checkRow : function(){
        var rs = [];
        for(var i=0; i<this._curBoxs.length; i+=2){
            isFound = false;
            r = this._curBoxs[i];
            for(var j=0; j<rs.length; j++){
                if(rs[j] == r){
                    isFound = true;
                    break;
                }
            }
            if(!isFound){
                rs.push(r);
            }
        }
        //
        rs.sort();
        //document.title = rs;
        var nCount = 0;
        for(var i=0; i<rs.length; i++){
            isFound = true;
            r = rs[i];
            for(var c=0; c<this._nMaxCol; c++){            
                if(this._map.rows[r].cells[c].isHave != true){
                    isFound = false;
                    break;
                }
            }
            if(isFound){
                nCount ++;
                this._deleteRow(r);
            }
        }
        if(nCount > 0){
            this._nLines += nCount;
            this._nScore += (Math.pow(2, nCount)-1) * 100;
            this._nSpeed = parseInt(this._nScore / 10000) ;
            this._nLevel = parseInt(this._nScore / 10000) ;
            if(this._nSpeed >= 10) this._nSpeed = 10;
            if(this._nLevel >= 10) this._nLevel = 10;
            this._showScore();
        }
    },
    _moveDown : function(isMove){
        if(this._gameState == "start"){
            var isMoved = true;
            this._clearTimer();
            
            if(isMove){
                isMoved = this._move("down");
            }
            if(!isMoved){ //不能移动
                this._setCurBox();
                if(this._gameState == "over"){
                    this._gameOver();
                    return;
                }
                //check row
                this._checkRow();
                //new
                this._showBoxs(false, false); //hide next
                this._createBox();
                this._showBoxs(true, true);
                this._showBoxs(false, true);
            }
        }
        //
        var self = this;
        
        this._nTimerID = setTimeout(function(){self._moveDown(true);}, self._nDelay - (self._nSpeed + self._nInitSpeed) * self._nInterval);
    },
    _changeShape : function(){
        var s = this._nCurShape + 1;
        var n = this._nCurNum;
        if(s >3 ) s = 0;
        if(s >= this._Boxs[n].length){
            if(this._Boxs[n].length == 1){
                s = 0;
            }else{
                s -= 2;
            }
        }    
        var tmp = this._parseBox(this._nCurRow, this._nCurCol, n, s);
        var isFound = false;
        for(var i=0; i<tmp.length; i+=2){
            r = tmp[i];
            c = tmp[i+1];
            if(r >= 0){
                if(r >= this._nMaxRow || c < 0 || c >= this._nMaxCol || this._map.rows[r].cells[c].isHave){
                    isFound = true;
                    break;
                }
            }
        }
        if(!isFound){
            this._showBoxs(true, false); //hide;
            this._curBoxs = tmp;
            this._nCurShape = s;
            this._showBoxs(true, true);
        }
        
        return !isFound;
    },
    _quickDown : function(){
        var add = 0, isFound = false;
        for(var i=this._nCurRow+1; !isFound && i<=this._nMaxRow; i++){
            add = i - this._nCurRow;
            for(var j=0; j<this._curBoxs.length; j+=2){
                r = add + this._curBoxs[j];
                c = this._curBoxs[j+1];
                if(r >= this._nMaxRow || this._map.rows[r].cells[c].isHave){
                    isFound = true;
                    break;
                }
            }
        }
        add -= 1;
        if(add > 0){
            this._showBoxs(true, false);
            this._nCurRow += add;
            for(var i=0; i<this._curBoxs.length; i+=2){
                this._curBoxs[i] += add;
            }
            this._showBoxs(true, true);
            
            this._moveDown(true);
        }
    },
    onKeyPress : function(keyCode){
        if(!(this._gameState == "start" || keyCode == 113 || keyCode == 118)) return;
        
        switch(keyCode){
            case 113: //F2
                this._start();
                break;
            case 118: //F7
                this._pause();
                break;
            case this._Keys.left: //37 Left
                this._move("left");
                break;
            case this._Keys.right: //39: //Right
                this._move("right");
                break;
            case this._Keys.cshape: //32: //Space 
                this._changeShape();
                break;
            case this._Keys.down: //40: //quick down
                this._quickDown();
                break;
        }
    },
    onCommand : function(sCommand){
        switch(sCommand){
            case "start":
                this._start();
                break;
            case "pause":
                this._pause();
                break;
            case "stop":
                this._stop();
                break;
        }
    },
    setMode : function(sMode){
        if(sMode == "adv"){
            this._nNum = 15;
        }else{
            this._nNum = 7;
        }
    },
    getMode : function(){
        if(this._nNum == 15){
            return "adv";
        }else{
            return "normal";
        }
    },
    setNum : function(n){
        if(n < 0 && n >15) n = 1;
        this._nNum = n;
    },
    getNum : function(n){
        return this._nNum;
    },
    setInit : function(nSpeed, nLevel){
        if(nSpeed < 0 || nSpeed > 10) nSpeed = 0;
        if(nLevel < 0 || nLevel > 10) nLevel = 0;
        this._nInitSpeed = nSpeed;
        this._nInitLevel = nLevel;
    },
    getInit : function(){
        return {speed: this._nInitSpeed, level: this._nInitLevel};
    },
    getDefaultKey : function(){
        return this._getDefaultKey();
    },
    getKey : function(){
        return this._Keys;
    },
    setKey : function(left, right, down, changeShape){
        this._Keys.left = left;
        this._Keys.right = right;
        this._Keys.down = down;
        this._Keys.cshape = changeShape;
    }
};