原生JS实现获取Select元素选中Value与Text值的方法

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>select元素</title>
</head>
<body id="bodyform">
    <select id="month">
         <option  value="01">January</option>
         <option  value="02">February</option>
         <option  value="03" selected="selected">March</option>
         <option  value="04">April</option>
         <option  value="05">May</option>
         <option  value="06">June</option>
         <option  value="07">July</option>
         <option  value="08">August</option>
         <option  value="09">September</option>
         <option  value="10">October</option>
         <option  value="11">November</option>
         <option  value="12">December</option>
    </select>
    <div>
        <input type="button" onclick="showValue()" value="显示Value值"></input>
        <input type="button" onclick="showText()" value="显示Text值"></input>
    </div>
    
</body>
      <script type="text/javascript">
          function showValue(){
            /*获取select选中的对象的value*/
            var select=document.querySelector("#month");
            alert("Value值:"+select.value);                     
          }
          function showText(){
            /*获取select选中的对象的text*/
            var select=document.querySelector("#month");
             alert("Text值:"+select.options[select.selectedIndex].text);
          }
      </script>
</html>