<h2>投票公布</h2>
	<div id="div1">
		<div class="a_1">50%</div>
		<div class="a_2">50%</div>
	</div>
	<!-- 紅隊投票 -->
	<div id="div2">
		<div >
			<img src="img/1.jpg" height="100%" width="100%" />
		</div>
		<div class="diaphane" id="result_1">
			<p>紅隊投票數(shù)：0</p>
		</div>
		<input type="button" name="aa" value="投紅隊" />
	</div>
	<!-- 藍隊投票 -->
	<div id="div3">
		<div>
			<img src="img/2.jpg" height="100%" width="100%" />
		</div>
		<div class="diaphane" id="result_2">

			<p>藍隊投票數(shù)：0</p>
		</div>
		<input type="button" name="aa" value="投藍隊" />
	</div>

window.onload = function () {
	//獲取div1及下面的div
	var oDiv = document.getElementById('div1');
	var aDiv = oDiv.getElementsByTagName('div');
	//獲取點擊按鈕
	var aBtn = document.getElementsByTagName('input');
	//初始化百分比數(shù)字
	var lNum = 50;
	var rNum = 50;
	//計算進度條寬度
	var lNums = (rNum / (lNum + rNum)) * 520;
	var rNums = 520 - lNums;
	//設(shè)置進度條width寬度
	aDiv[1].style.width = parseInt(lNums) + 'px';
	aDiv[0].style.width = 520 - parseInt(lNums) + 'px';
	//設(shè)置進度條百分比數(shù)字
	aDiv[0].innerHTML = sub((lNum / (lNum + rNum)) * 100 + "") + "%";
	aDiv[1].innerHTML = sub((1 - lNum / (lNum + rNum)) * 100 + "") + "%";
	//初始化投票數(shù)
	var leftNum = 0;
	var rightNum = 0;
	//綁定紅隊投票按鈕點擊事件
	aBtn[0].onclick = function () {
		//每次點擊累加投票數(shù)
		lNum = lNum + (++leftNum);
		//計算div對應(yīng)長度
		var lNumss = parseInt(leftNum / (leftNum + rightNum) * 520);
		//設(shè)置進度條width寬度
		aDiv[0].style.width = lNumss + 'px';
		aDiv[1].style.width = (520 - lNumss) + 'px';
		//計算div百分比數(shù)字
		aDiv[0].innerHTML = sub((leftNum / (leftNum + rightNum)) * 100 + "") + "%";
		aDiv[1].innerHTML = sub((1 - leftNum / (leftNum + rightNum)) * 100 + "") + "%";
		//設(shè)置投票數(shù)
		document.getElementById("result_1").innerHTML = "紅隊投票數(shù)：" + leftNum;
	}
	//綁定藍隊投票按鈕點擊事件
	aBtn[1].onclick = function () {
		//每次點擊累加投票數(shù)
		rNum = rNum + (++rightNum);
		//計算div對應(yīng)長度
		var rNumss = parseInt(rightNum / (leftNum + rightNum) * 520);
		//設(shè)置進度條width寬度
		aDiv[0].style.width = (520 - rNumss) + 'px';
		aDiv[1].style.width = rNumss + 'px';
		//計算div百分比數(shù)字
		aDiv[0].innerHTML = sub((leftNum / (leftNum + rightNum)) * 100 + "") + "%";
		aDiv[1].innerHTML = sub((1 - leftNum / (leftNum + rightNum)) * 100 + "") + "%";
		//設(shè)置投票數(shù)
		document.getElementById("result_2").innerText = "藍隊投票數(shù)：" + rightNum;
	}
	//保留小數(shù)點后兩位
	function sub(str) {
		var index = str.lastIndexOf(".");
		if (index == -1) {
			return str;
		}
		return str.substring(0, index + 3);
	}
}

* {
	margin: 0;
	padding: 0;
	list-style-type:none;
}
a,img{border:0;}

.vote{
	width:530px;
	margin:100px auto;
}

.vote h2{
	height:24px;
	line-height:24px;
	font-size:18px;
	font-weight:400;
	margin-bottom:20px;
	text-align:center;
}

#div1 {
	width: 520px;
	height: 30px;
	position: relative;
}

#div2 {
	margin:30px 20px 0 0;
	width: 250px;
	height: 325px;
	float: left;
	display:inline;
	position: relative;
}

#div3 {
	margin-top: 30px;
	margin-left: 2px;
	width: 250px;
	height: 325px;
	float: left;
}

.a_1,
.a_2 {
	position: absolute;
	top: 0;
	color:#fff;
	text-align:center;
	height:30px;
	line-height:30px;
}

.a_1 {
	left: 0;
	background:#3366cc;
}

.a_2 {
	right: 0;
	background:#ff6600;
}

.vote input {
	padding-top: 20px;
	width: 250px;
	position: absolute;
	color: #fff;
	border-radius: 1rem;
	text-decoration: none;
	padding: 1rem 2rem;
	margin-bottom: 1rem;
	min-width: 10rem;
	text-align: center;
	background-color: #6a4;
	border:0;
	cursor:pointer;
}

.diaphane {
	color: #000;
	margin:10px 0;
	text-align:center;
}