Home
JS
JS
Tryit: JAVASCRIPT
运行 ❯
×
Change Orientation
Change Theme, Dark/Light
<!DOCTYPE html> <html> <body> <p>从列表中选择一辆新车。</p> <select id="mySelect" onchange="myFunction()"> <option value="Audi">Audi</option> <option value="BMW">BMW</option> <option value="Mercedes">Mercedes</option> <option value="Volvo">Volvo</option> </select> <p>当您选择一辆新车时，会触发一个函数，输出所选汽车的值。</p> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("mySelect").value; document.getElementById("demo").innerHTML = "您选择了：" + x; } </script> </body> </html>