下面的两个文件copy到同一个文件下，通过Web路径访问index.html看看吧，这个是通过iframe来实现的连动更新，list.PHP目前的内容比较简单，你看通过list.php来进行数据库查询，然后显示出查询的结果列表。 index.html <body>
<form name="myfrm">
<select name="mlist" onchange="changes();">
<option value="0">请选择...</option>
<option value="北京">北京</option>
<option value="通化">通化</option>
</select>
<select name="slist">
</select>
<iframe id="frame" src="list.php?city=" style="display:none;"></iframe>
<script language="JavaScript">
function changes(){
frame.location.href = "list.php?city=" + document.myfrm.mlist.value;
}
</script>
</form>
</body> list.php <?php
$data = array("北京"=>array("小强","旺财","小强他爹"),
"通化"=>array("小温","小宋","他们儿子"),);
$city =
用php实现真正的连动下拉列表_网学
浏览：
GET["city"];
$result = $data[$city];
$str = "<script language="Javascript">list = parent.document.myfrm.slist;list.length = 0;";
if($result==null)
$str .= "tmp = new Option("......", "");list.options[0] = tmp;";
else
foreach($result as $i => $value)
$str .= "tmp = new Option("{$value}", "{$value}");list.options[$i] = tmp;";
$str .= "</script>";
echo $str;
?> 来源：http://blog.csdn.net/hahawen (责任编辑：admin) |
