| <html> | |
| <head> | |
| <script src="https://code.jquery.com/jquery-3.3.1.min.js"></script> | |
| <script type="text/javascript"> | |
| $(document).ready(function(){ | |
| $(".field").change(function(){ | |
| $(this).css("background-color","#FFFFCC"); | |
| }); | |
| }); | |
| </script> | |
| </head> | |
| <body> | |
| <p>在某个域被使用或改变时，它会改变颜色。</p> | |
| Enter your name: <input class="field" type="text" /> | |
| <p>Car: | |
| <select class="field" name="cars"> | |
| <option value="volvo">Volvo</option> | |
| <option value="saab">Saab</option> | |
| <option value="fiat">Fiat</option> | |
| <option value="audi">Audi</option> | |
| </select> | |
| </p> | |
| </body> | |
| </html> | |