DEDE有现成的二级联动管理,可以添加并生成二级联动的JS代码,使用起来非常方便。
如果要实现自己的效果,可能要对联动过程做一点开发。
下面的代码实例是在二级联动的过程中,添加了一个新的字段,以保存选项的值,并在前台根据JS的值做不同的事件。
- <?php
- require_once(dirname(__FILE__)."/../include/common.inc.php");
- //查询根节点
- $dsql->SetQuery("SELECT evalue,ename from `ddmx_sys_enum` where egroup='center' AND evalue%500 = 0 order by disorder asc, evalue asc");
- $dsql->Execute();
- $enums = array();
- $sort = 1 ;
- while($row = $dsql->GetArray())
- {
- $options .= "<option value=\"{$sort}\">{$row['ename']}</option>\r\n";
- $enums[] = $row['evalue'];
- $sort ++ ;
- }
- $count = count($enums);
- foreach($enums as $i=>$evalue)
- {
- //添加了一个名为link的字段,保存选项的跳转链接
- $dsql->SetQuery("SELECT evalue,ename,link from `ddmx_sys_enum` where egroup='center' AND evalue > {$evalue} AND evalue < ({$evalue} + 500) order by disorder asc, evalue asc");
- $dsql->Execute();
- $sort = 0 ;
- $i++;
- while($row = $dsql->GetArray())
- {
- $js .= "select2[". $i ."][{$sort}] = new Option(\"{$row['ename']}\", \"{$row['link']}\");\r\n";
- $sort++;
- }
- }
- $html = '
- <form name="frm">
- <div class="city_sch">
- <h2 class="f13">选择里您最近的学习中心</h2>
- <table width="190" height="128" border="0" align="center" cellpadding="0" cellspacing="0">
- <tr>
- <td height="51" align="center" valign="middle"><label>
- <select name="s1" onChange="redirec(document.frm.s1.options.selectedIndex)">
- <option selected>点击选择城市</option>
- '. $options .'
- </select>
- </label></td>
- </tr>
- <tr>
- <td height="22" align="center" valign="middle"><label>
- <select name="s2" id="s2">
- <option value="点击选择中心" selected>点击选择中心</option>
- </select>
- </label></td>
- </tr>
- <tr>
- <td height="55" align="center" valign="middle"><label>
- <input type="submit" name="button" id="button" value="马上提交" onclick="window.location=document.frm.s2.value;return false;"/>
- </label></td>
- </tr>
- </table>
- </div>
- </form>
- <script language="javascript">
- var select1_len = document.frm.s1.options.length;
- var select2 = new Array(select1_len);
- for (i=0; i<select1_len; i++)
- {
- select2[i] = new Array();
- }
- select2[0][0] = new Option("请选择", " ");
- '. $js .'
- function redirec(x)
- {
- var temp = document.frm.s2;
- for (i=0;i<select2[x].length;i++)
- {
- temp.options[i]=new Option(select2[x][i].text,select2[x][i].value);
- }
- temp.options[0].selected=true;
- }
- </script>
- ';
- $html = addslashes(str_replace(array("\r\n", '"'), array('', '\''), $html));
- echo "document.write(\" $html \")";
- ?>
本文来源:4wei原文链接