<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<style>
.box{
margin: 5px auto;
width: 800px;
}
#left,#right{
width: 400px;
height: 200px;
background-image:url(../img/a.jpg);
margin: 50px auto;
float: left;
}
#right{
transform: scale(-1,1);
float: left;
}
#divs{
float:left;
font-size: 40px;
color: red;
margin-left: 100px;
}
</style>
<body>
<div class="box">
<div id="left"></div>
<div id="right"></div>
<div style="float: left;">
<button id="bn0">剪刀</button>
<button id="bn1">石头</button>
<button id="bn2">布</button>
</div>
<div id="divs"></div>
</div>
<script>
// var num=Math.random()*10;//随机数后面乘以几就是随机到几
// num=parseInt(num);
var left=document.getElementById("left");
var right=document.getElementById("right");
var bn0=document.getElementById("bn0");
var bn1=document.getElementById("bn1");
var bn2=document.getElementById("bn2");
var divs=document.getElementById("divs");
bn0.οnclick=function(){
//点击剪刀按钮
var n=Math.random()*3;
n=parseInt(n);
// 得到随机数0.1.2
left.style.backgroundPositionY="0px";
if(n===0){
right.style.backgroundPositionY="0px";
divs.innerHTML="平局";
}else if(n===1){
right.style.backgroundPositionY="-200px";
divs.innerHTML="输了";
}else if(n===2){
right.style.backgroundPositionY="-400px";
divs.innerHTML="赢了";
}
};
// 点击石头时
bn1.οnclick=function(){
var n=Math.random()*3;
n=parseInt(n);
left.style.backgroundPositionY="-200px";
if(n===0){
right.style.backgroundPositionY="0px";
divs.innerHTML="赢了";
}else if(n===1){
right.style.backgroundPositionY="-200px";
divs.innerHTML="平局";
}else if(n===2){
right.style.backgroundPositionY="-400px";
divs.innerHTML="输了";
}
};
// 点击布时
bn2.οnclick=function(){
var n=Math.random()*3;
n=parseInt(n);
left.style.backgroundPositionY="-400px";
if(n===0){
right.style.backgroundPositionY="0px";
divs.innerHTML="输了";
}else if(n===1){
right.style.backgroundPositionY="-200px";
divs.innerHTML="赢了";
}else if(n===2){
right.style.backgroundPositionY="-400px";
divs.innerHTML="平局";
}
};
</script>
</body>
</html>
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