jq 点击把下拉框的值累加到文本框值中-CFANZ编程社区

jq 点击把下拉框的值累加到文本框值中

<!DOCTYPE html>
<html>        
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
  <title>dj</title>

  <script src="https://cdn.bootcss.com/jquery/1.10.2/jquery.min.js"></script>
</head>
<!-- 加在body标签中屏蔽右键 οncοntextmenu="return false" -->
<body >
<input name="subject" id="subject" type="hidden" data-label="," value="">
              <select name="city" id="s2" lay-search>
                  <option value="">请选择</option>
                  <option value="layer">layer</option>
                  <option value="form">form</option>
                  <option value="layim">layim</option>    
              </select>
<button class="layui-btn " type="button" id="add_subject">添加</button>

<script>
    var seleVal='';
    $("#add_subject").on("click",function(){
        seleVal+=$("#s2>option:selected").val()+',';
        $("#subject").val(seleVal);
    }) 
</script>
</body>
</html>

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