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<!DOCTYPE html> <html> <body> <form> <select id="mySelect" multiple> <option>苹果</option> <option>桃子</option> <option>香蕉</option> <option>桔子</option> </select> </form> <p>单击“试一试”按钮可返回下拉列表的表单元素类型。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("mySelect").type; document.getElementById("demo").innerHTML = x; } </script> </body> </html>