使用html+css+js实现弹球游戏

代码如下，复制即可使用：

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<!doctype html>

<head>

.panel{

position: relative;

z-index: 0;

top:0px;

left: 400px;

width: 300px;

height: 500px;

}

.console{

position: absolute;

z-index: 1;

top:0;

left:0;

width:100%;

height: 40px;

background-color: #bbb;

}

.message{

position: absolute;

z-index: 1;

top:40px;

left:0;

width:100%;

height: 460px;

color: white;

font-size: 50px;

text-align: center;

line-height: 460px;

background-color: #999;

}

.start,.score,.pause{

position: absolute;

z-index: 2;

top: 0;

width: 100px;

height: 100%;

font-size: large;

color: white;

text-align: center;

line-height: 40px;

background: -webkit-linear-gradient(top,#4ca8ff,yellow);

}

.start{

left: 0px;

}

.score{

left:100px;

background-color: red;

}

.pause{

left:200px;

}

.start:after,.pause:before{

content: "";

position: absolute;

z-index: 2;

top: 0;

width: 3px;

height: 100%;

background: -webkit-linear-gradient(top,#666,#999);

}

.start:after{

left: 97px;

}

.pause:before{

left: 0px;

}

.start:hover,.pause:hover{

cursor: pointer;

background: -webkit-linear-gradient(top,#4ca8ff,red);

}

.panel span{

position: absolute;

z-index: 0;

top:50%;

left: 50%;

font-size: 50px;

color: blue;

}

.ball,.secondBall{

position:absolute;

z-index: 2;

border-radius:50%;

width: 20px;

height: 20px;

}

.ball{

top: 460px;

left:140px;

background-color: red;

}

.secondBall{

top: 40px;

left:140px;

background-color: red;

}

.plate{

position: absolute;

top:480px;

left: 100px;

z-index: 2;

width: 100px;

height: 20px;

background-color: #e5e5e5;

}

.promte{

margin-top: 20px;

text-align: center;

}

</style>

</head>

<body>

</div>

</div>

<div class="promte">提示：键盘左右箭头控制滑板</div>

(function(){

document.onkeydown = function(e){

var e = e || window.event;

if(e.keyCode == 37){

//键盘向左键

plateMove("left");

}else if(e.keyCode == 39){

//键盘向右键

plateMove("right");

}

})();

var panel = document.getElementById("panel"),

message = document.getElementById("message"),

plate = document.getElementById("plate"),

ball = document.getElementById("ball"),

start = document.getElementById("start"),

score = document.getElementById("score"),

pause = document.getElementById("pause"),

secondBall;

var startGame, x = x2 = -1, y = y2 = -1, speed = 1, positionArr = [], pauseActive = false,

//一个标志：表示难度是否还能增加

flag = true,

//球的起始位置

ballX, ballY, secondBallX, secondBallY,

//边界

minX = 0,

maxX = panel.offsetWidth - ball.offsetWidth,

minY = 40;

maxY = panel.offsetHeight - ball.offsetHeight - plate.offsetHeight;

window.onload = function(){

if(window.addEventListener){

start.addEventListener("click",startClick,false);

pause.addEventListener("click",pauseClick,false);

}else if(window.attachEvent){

start.attachEvent("onclik",startClick);

pause.attachEvent("onclik",pauseClick);

}else{

start.onclik = startClick;

pause.onclik = pauseClick;

}

function plateMove(direction){

if(direction == "left"){

if(plate.offsetLeft > 0){

plate.style.left = (plate.offsetLeft-30 < 0? 0 : plate.offsetLeft-30)+"px";

}

if(direction == "right"){

if(plate.offsetLeft < 200){

plate.style.left = (plate.offsetLeft+30 > 200? 200 : plate.offsetLeft+30)+"px";

}

function startClick(){

if(!pauseActive){

resetGame();

}else{

pauseActive = !pauseActive;

}

startGame = setInterval(function(){

//console.log(ballX+"======"+ballY);

positionArr = setPosition(ballX,ballY,true);

if(positionArr == "GAMEOVER"){

return;

}

ballX = positionArr[0];

ballY = positionArr[1];

//设置球的位置

ball.style.left = ballX+"px";

ball.style.top = ballY+"px";

if(!flag){

positionArr = setPosition(secondBallX,secondBallY,false);

secondBallX = positionArr[0];

secondBallY = positionArr[1];

secondBall.style.left = secondBallX+"px";

secondBall.style.top = secondBallY+"px";

}else{

addDifficulty();

}

},30);

}

function pauseClick(){

pauseActive = true;

clearInterval(startGame);

}

function resetGame(){

clearInterval(startGame);

message.innerHTML="";

score.innerHTML="0";

ball.style.left = "140px";

ball.style.top = "460px";

plate.style.left = "100px";

plate.style.top = "480px";

ballX = ball.offsetLeft;

ballY = ball.offsetTop;

speed = 1;

flag = true;

//第二个球设置隐藏

if(secondBall){

secondBall.style.display="none";

secondBall.style.left = "140px";

secondBall.style.top = "40px";

}

function addDifficulty(){

if(parseInt(score.innerHTML) > 500 && parseInt(score.innerHTML) < 2000){

speed = 1.2;

}else if(parseInt(score.innerHTML) > 2000 && parseInt(score.innerHTML) < 5000){

speed = 1.5;

}else if(parseInt(score.innerHTML) > 5000){

if(typeof secondBall != "undefined"){

secondBall.style.display="";

}else{

secondBall = document.createElement('div');

}

secondBall.className = 'secondBall';

panel.appendChild(secondBall);

secondBallX = secondBall.offsetLeft;

secondBallY = secondBall.offsetTop;

flag = false;

}

function setPosition(_x,_y,firstball){

if(_x == minX || _x == maxX){

//x*=-1;

firstball? x*=-1 : x2*=-1;

}

if(_y == minY || _y == maxY){

//y*=-1;

firstball? y*=-1 : y2*=-1;

}

if(_y == maxY){

//判断挡板的位置是不是在球的范围内

if(plate.offsetLeft > _x || (plate.offsetLeft + plate.offsetWidth) < _x){

clearInterval(startGame);

message.innerHTML="GAMEOVER";

return "GAMEOVER";

}

if(firstball){

_x+=4*x*speed;

_y+=5*y*speed;

}else{

_x+=4*x2*speed;

_y+=5*y2*speed;

}

//边界处理

_x = _x < minX? minX : _x;

_x = _x > maxX? maxX : _x;

_y = _y < minY? minY : _y;

_y = _y > maxY? maxY : _y;

//设置分数

score.innerHTML=parseInt(score.innerHTML)+10*speed;

return [_x,_y];

}

</script>

</body>

</html>

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