checkbox实现click事件触发span元素内容改变

来源：宝玛科技网

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>checkbox</title>
 <script src="jquery.js"></script>
</head>
<body>
<p>我想去<span id="spanId">_____</span></p>
<form action="#" id="form">
 <input type="checkbox" name="city" value="南京">南京 
 <input type="checkbox" name="city" value="北京">北京 
 <input type="checkbox" name="city" value="纽约">纽约</form>
<script>
 $(function () {
 $("input[name=city]").click(function () { 
 var arr = [];
 $("input[name=city]").each(function () { 
 if(this.checked){
 arr.push(this.value);
 }else{ 
 var index = arr.indexOf(this.value); 
 if(index != -1){
 arr[index] = "";
 }
 }
 });
 $("#spanId").text(arr.join(","));
 })
 });</script>
</body>
</html>

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