基於js實現投票的實例代碼
編輯：關於JavaScript
本文實例講述了JavaScript實現三種投票方式的實現方法，分享給大家供大家參考。具體如下：
一、js柱狀投票圖
效果圖：
實現代碼：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>js柱狀投票圖</title>
<style type="text/css">
body { font-weight:bold; color:#fff; font-size:16px; font-family:Arial, Helvetica, sans-serif; background-color:#000000;}
.zhu { margin-top:100px; width:420px; position:relative;}
.good { width:200px; position:absolute; bottom:0; left:0; text-align:center; background-color:#f00; height:50px;}
.bad { width:200px;position:absolute; bottom:0; right:0; text-align:center; background-color:#009900; height:50px;}
.and {}
</style>
<script type="text/javascript">
//innerHTML 屬性設置或返回表格行的開始和結束標簽之間的 HTML。
//value 屬性可設置或返回單選按鈕的 value 屬性的值。
//所有css在DOM結構裡面都是字符型的 沒有數字型的
function TouPiao(){
var good= parseInt(document.ballot.good_num.value);
var bad= parseInt(document.ballot.bad_num.value);
var sum= good+bad;
var sum_g=Math.round(good/sum*100);
var sum_b=Math.round(bad/sum*100);
document.getElementByIdx_x_x_x("and").innerHTML = "總數為:"+sum+"票";
document.getElementByIdx_x_x_x("g").innerHTML = "好評"+sum_g+"%";
document.getElementByIdx_x_x_x("b").innerHTML = "差評:"+sum_b+"%";
document.getElementByIdx_x_x_x("g").style.height = sum_g+"px";
document.getElementByIdx_x_x_x("g").style.marginTop = (sum_g-100)+"px";
document.getElementByIdx_x_x_x("b").style.height = sum_b+"px";
document.getElementByIdx_x_x_x("b").style.marginTop = (sum_b-100)+"px";
}
</script>
</head>
<body>
<form action="" method="get" name="ballot">
好評票數：<input name="good_num" type="text" /><br />
差評票數：<input name="bad_num" type="text" /><br />
<input name="bt" type="button" value="提交" onclick="TouPiao()" />
</form>
<div class="zhu">
<div class="good" id="g">好評50%</div>
<div class="bad" id="b">差評50%</div>
</div>
<div class="and" id="and">總數為0票</div>
</body>
</html>
二、JS投票
效果圖：
實現代碼：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>投票 </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<mce:style><!--
.voteresult{
margin: 2px;
margin-top: 5px;
display: block;
float: left;
width: 250px;
height: 10px;
background-color: #EEE;
overflow: hidden;
}
.style3{
background-color: #666666;
}
--></mce:style><style mce_bogus="1"> .voteresult{
margin: 2px;
margin-top: 5px;
display: block;
float: left;
width: 250px;
height: 10px;
background-color: #EEE;
overflow: hidden;
}
.style3{
background-color: #666666;
}
</style>
<mce:script type="text/javascript"><!--
var total_vote = 0;
var lq_vote = 0;
var zq_vote = 0;
var ppq_vote = 0;
function vote(){
var selectItem = 0;
var items = document.getElementsByName("item");
for(i = 0; i < items.length; i++){
if(items[i].checked){
selectItem++;
total_vote++;
switch(parseInt(items[i].value)){
case 1: lq_vote++;break;
case 2: zq_vote++;break;
case 3: ppq_vote++;break;
}
}
}
if(selectItem <= 0){
alert("請先選擇您喜歡的運動");
return;
}
var lq_num = new Number(lq_vote/total_vote);
var zq_num = new Number(zq_vote/total_vote);
var ppq_num = new Number(ppq_vote/total_vote);
alert("投票成功");
setSpanWidth(lq_num, 1);
setSpanWidth(zq_num, 2);
setSpanWidth(ppq_num, 3);
for(i = 0; i < items.length; i++){
items[i].checked = false;
}
}
//設置投票結果顯示
function setSpanWidth(vote_num, type){
var _width = new Number(250*vote_num);
var _span = document.getElementByIdx_x_x_x("span" + type);
var _span1 = document.getElementByIdx_x_x_x("span1" + type);
//alert(_span.style.width);
_span.style.width = _width.toFixed(0);
var _percent = new Number(100*vote_num);
_span1.innerHTML = _percent.toFixed(1) + "%";
}
// --></mce:script>
</HEAD>
<BODY>
你喜歡的運動：
<br>
籃球 <input type="checkbox" name="item" value="1"> 足球 <input type="checkbox" name="item" value="2"> 乒乓球 <input type="checkbox" name="item" value="3">
<br>
<input type="button" value="提 交" onclick="vote();">
<br>
<br>
<table>
<tr>
<td colspan=3><b>投票結果</b></td>
</tr>
<tr>
<td>籃球</td>
<td><div class="voteresult"><span id="span1" class="style3" style="width: 0px;"></span></div></td>
<td><span id="span11">0%</span><td>
</tr>
<tr>
<td>足球</td>
<td><div class="voteresult"><span id="span2" class="style3" style="width: 0px;"></span></div></td>
<td><span id="span12">0%</span><td>
</tr>
<tr>
<td>乒乓球</td>
<td><div class="voteresult"><span id="span3" class="style3" style="width: 0px;"></span></div></td>
<td><span id="span13">0%</span><td>
</tr>
</table>
</BODY>
</HTML>
三、投票
效果圖：
實現代碼：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>無標題文檔</title>
<style type="text/css">
body{ font-size:12px;}
</style>
<script language="javascript">
function add(txt)
{
var abc = document.getElementByIdx_x("abc");
abc.innerHTML = parseInt(abc.innerHTML) + 1;
}
</script>
</head>
<body>
<table width="50" height="50" border="1" cellpadding="0" cellspacing="0">
<tr>
<td align="center" valign="middle"><div id="abc">0</div></td>
</tr>
<tr>
<td align="center" valign="middle"><a href="#" onclick="add(1)">投一票</a></td>
</tr>
</table>
</body>
</html>
以上就是本文的全部內容，希望對大家的學習有所幫助。
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