select对象和option对象联合应用

冷不防 2022-05-12 00:12 109阅读 0赞

**一 代码**

1、在页面中添加一个2行3列的表格，在左右两边的单元格中添加滚动列表，在中间的单元格中添加两个按钮。代码如下：

<form name="form1" method="post" action="">
    <table width="380" border="0" align="center" cellpadding="0" cellspacing="0">
     <tr>
     <td width="150"><table width="150" border="0" cellpadding="1" cellspacing="1" bgcolor="#CAFAFC">
     <tr>
     <td height="25" background="images/bg.jpg" bgcolor="#FFFFFF">      任务地区1</td>
     </tr>
     <tr>
     <td align="center" bgcolor="#FFFFFF"><select name="sel_place1" size="6" multiple id="sel_place1" style="width:100px " >
     <option value="sel1">甘肃省</option>
     <option value="sel2">辽宁省</option>
     <option value="sel3">黑龙江省</option>
     <option value="sel4">吉林省</option>
     <option value="sel5">浙江省</option>
     </select></td>
     </tr>
     </table></td>
     <td width="80" align="center" valign="bottom"><input name="sure1" type="button" id="sure1"
     onClick="allsel(document.form1.sel_place2,document.form1.sel_place1);" value="<<">
      
     <input name="sure2" type="button" id="sure2"
     onClick="allsel(document.form1.sel_place1,document.form1.sel_place2);" value=">>" align="center" height="2"></td>
     <td width="150"><table width="150" border="0" cellpadding="1" cellspacing="1" bgcolor="#CAFAFC">
     <tr>
     <td height="25" background="images/bg.jpg" bgcolor="#FFFFFF">      任务地区2</td>
     </tr>
     <tr>
     <td align="center" bgcolor="#FFFFFF"><select name="sel_place2" size="6" multiple id="sel_place2" style="width:100px ">
     </select></td>
     </tr>
     </table></td>
     </tr>
    </table>
    </form>

2、编写用于实现在滚动列表框中进行选项移除的JavaScript代码：

**二 运行效果**

![d414f8cd-1aac-39f5-b0f5-e2173c2362da.png][]

[d414f8cd-1aac-39f5-b0f5-e2173c2362da.png]: /images/20220512/d2425a5ede864a50970bdd655c56afb1.png