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js給dropdownlist添加選項(xiàng)的小例子

 更新時(shí)間：2013年03月04日 10:53:20   作者：  
js給dropdownlist添加選項(xiàng)的小例子，需要的朋友可以參考一下

復(fù)制代碼 代碼如下:

  <input name="" type="text"  id="newDirtxt"/>

<input class="btn" name="" type="button" value="創(chuàng)建新目錄"  onclick="newDir()" />
 

?<BR><BR><BR>Js代碼 <BR><BR><script type="text/javascript">
////創(chuàng)建新目錄
        function newDir() {
            var txt = document.getElementById("newDirtxt");
            var dirname = txt.value;
            if (dirname) {
                alert("請(qǐng)?zhí)顚?xiě)目錄名");
            } else {
                $.ajax({
                    type: "Post",
                    url: "/center/directorynew",
                    async: false,
                    data: { dirname: dirname },
                    success: function(msg) {
                        if (msg.length < 40) {
                            var DirectoryID = document.getElementById("DirectoryID");
                            var tOption = document.createElement("Option");
                            tOption.text = dirname;
                            tOption.value = msg;
                            DirectoryID.appendChild(tOption);
                            txt.value = "";
                            alert("增加成功");

                        } else {
                            alert("增加失敗");
                        }
                    }
                });
            }//else
        }
    </script><BR><BR><BR>后臺(tái)代碼 <BR><BR>返回剛剛插入的目錄的id字符串 <BR>

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