W3School TIY
编辑您的代码：
<html> <head> <script type="text/javascript"> function moveNumbers() { var no=document.getElementById("no") var option=no.options[no.selectedIndex].text var txt=document.getElementById("result").value txt=txt + option document.getElementById("result").value=txt } </script> </head> <body> <form> 请选择数字：<br /> <select id="no"> <option>0</option> <option>1</option> <option>2</option> <option>3</option> <option>4</option> <option>5</option> <option>6</option> <option>7</option> <option>8</option> <option>9</option> </select> <input type="button" onclick="moveNumbers()" value="-->"> <input type="text" id="result" size="20"> </form> </body>
查看结果: