DEDECMS+Js实现自定义二级联动

$dsql->SetQuery("SELECT evalue,ename from `ddmx_sys_enum` where egroup='center' AND evalue%500 = 0 order by disorder asc, evalue asc");$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){

  $dsql->SetQuery("SELECT evalue,ename,link from `ddmx_sys_enum` where egroup='center' AND evalue > {$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 /")";?>