运行结果：
源代码：
1 <!DOCTYPE html>
2 <html lang="zh">
3 <head>
4 <meta charset="UTF-8">
5 <title>选项移动</title>
6 </head>
7 <body>
8 <table width="285" height="169" border="0" align="left" cellpadding="0" cellspacing="0"
9 style="margin: 15px 0px 0px 15px;">
10 <tr>
11 <td width="126">
12 <!--multiple="multiple" 能同时选择多个 size="10" 确定下拉选的长度-->
13 <select name="first" multiple="multiple" size=10 class="td3" id="s">
14 <option value="选项1">选项1</option>
15 <option value="选项2">选项2</option>
16 <option value="选项3">选项3</option>
17 <option value="选项4">选项4</option>
18 <option value="选项5">选项5</option>
19 <option value="选项6">选项6</option>
20 <option value="选项7">选项7</option>
21 <option value="选项8">选项8</option>
22 </select>
23 </td>
24 <td width="69" valign="middle">
25 <input name="add" id="add" type="button" class="button" value="-->"/>
26 <input name="add_all" id="add_all" type="button" class="button" value="==>"/>
27 <input name="remove" id="remove" type="button" class="button" value="<--"/>
28 <input name="remove_all" id="remove_all" type="button" class="button" value="<=="/>
29 </td>
30 <td width="127" align="left">
31 <select name="second" size="10" multiple="multiple" class="td3" id="second">
32 <option value="选项9">选项9</option>
33 </select>
34 </td>
35 </tr>
36 </table>
37 <script type="text/javascript">
38 // 左右两边的select
39 var leftSelect = document.getElementById("s");
40 var leftItems = leftSelect.children;
41 var rightSelect = document.getElementById("second");
42 var rightItems = rightSelect.children;
43 var selectedItems = [];
44
45 // 4个 按钮
46 // 01 -> left2right selected
47 document.getElementById("add").onclick = function () {
48 // todo
49 selectedItems.splice(0, selectedItems.length); // 删除自身的全部元素
50 for (var i = 0; i < leftItems.length; i++) {
51 var item = leftItems[i];
52 if (item.selected) {
53 selectedItems.push(item);
54 }
55 }
56 for (var j = 0; j < selectedItems.length; j++) {
57 rightSelect.appendChild(selectedItems[j]);
58 // leftSelect.removeChild(selectedItems[j]); todo ->为什么左边的不需要移除呢？
59 }
60 };
61 // 02 -> left2right all
62 document.getElementById("add_all").onclick = function () {
63 // todo
64 selectedItems.splice(0, selectedItems.length); // 删除自身的全部元素
65 // alert(selectedItems.concat(selectedItems,leftItems).length); // todo ->为什么添加之后长度只是1？
66 for (var i = 0; i < leftItems.length; i++) {
67 var item = leftItems[i];
68 selectedItems.push(item);
69 }
70 for (var j = 0; j < selectedItems.length; j++) {
71 rightSelect.appendChild(selectedItems[j]);
72 }
73 };
74 // 03 -> right2left selected
75 document.getElementById("remove").onclick = function () {
76 // todo
77
78 selectedItems.splice(0, selectedItems.length); // 删除自身的全部元素
79 for (var j = 0; j < rightItems.length; j++) {
80 var item = rightItems[j];
81 if (item.selected) {
82 selectedItems.push(item);
83 }
84 }
85
86 for (var i = 0; i < selectedItems.length; i++) {
87 leftSelect.appendChild(selectedItems[i]);
88 }
89 };
90 // 04 -> right2left all
91 document.getElementById("remove_all").onclick = function () {
92 // todo
93 selectedItems.splice(0, selectedItems.length); // 删除自身的全部元素
94 for (var j = 0; j < rightItems.length; j++) {
95 var item = rightItems[j];
96 selectedItems.push(item);
97 }
98 for (var i = 0; i < selectedItems.length; i++) {
99 leftSelect.appendChild(selectedItems[i]);
100 }
101 };
102
103 // 双击事件
104 leftSelect.ondblclick = function () {
105 // 左边select控件的双击事件
106 // alert(leftSelect.selectedIndex);
107 rightSelect.appendChild(leftItems[leftSelect.selectedIndex]);
108 };
109
110 rightSelect.ondblclick = function () {
111 leftSelect.appendChild(rightItems[rightSelect.selectedIndex]);
112 };
113 </script>
114 <!--<script type="text/javascript" src="js/selectTest.js"></script>-->
115 </body>
116 </html>
原文地址：https://www.cnblogs.com/yijiahao/p/11770578.html
时间： 2024-10-10 08:54:01