用PHP实现真正的连动下拉列表
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 = $_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;教程地址：http://www.phprm.com/develop/fs902.html
欢迎转载！但请带上文章地址^^