php+ajax级联菜单[无刷新级联菜单]

<?php
header("Content-type: text/html;charset=GBK");//输出编码,避免中文乱码
require_once(dirname(__FILE__)."/include/config_base.php");
require_once(dirname(__FILE__)."/include/inc_type.php");
require_once(dirname(__FILE__)."/include/inc_cache.php");

$fatherid="";
$fatherid=$_GET['fatherid'];

if(!empty($fatherid)){

if(!file_exists('/cache/sun_'.$fatherid.'_cache.txt')){

$ty = new Type(0);

$typeOptions = $ty->GetSmallOption($fatherid);

if(!empty($typeOptions)){

cache_write('/cache/sun_'.$fatherid.'_cache.txt', $typeOptions);

echo "<select name='sunid' style='width:200'>rn";

echo $typeOptions;

echo "</select>";

$tl->Close();

}

}else{

$typeOptions=cache_get('/cache/sun_'.$fatherid.'_cache.txt');

echo "<select name='sunid' style='width:200'>rn";

echo $typeOptions;

echo "</select>";

}
}
?>

<div id="BigType">
</div>
<div id="SmallType">
</div>

<script language="JavaScript" src="prototype-1.6.0.2.js"></script>
<script>
function GetBigType (){
       var url='GetBigType.php';
       var pars='pid=1';
       var myAjax=new Ajax.Updater('BigType', url, {method:'get', parameters:pars});
}
GetBigType ();
function GetSmallType(){
       var fatherid=$F('fatherid');
       var url=' GetSmallType.php';
       var pars='fatherid='+fatherid;
       var myAjax =new Ajax.Updater('SmallType', url, {method:'get', parameters:pars});
}
</script>

<?php
header("Content-type: text/html;charset=GBK");//输出编码,避免中文乱码
require_once(dirname(__FILE__)."/include/config_base.php");
require_once(dirname(__FILE__)."/include/inc_type.php");
require_once(dirname(__FILE__)."/include/inc_cache.php");
$pid="";
$pid=$_GET['pid'];
if($pid==1){

if(!file_exists('../cache/bigtype.cache.txt')){

$ty = new Type(0);

$typeOptions = $ty->GetBigOption();

cache_write('/cache/bigtype.cache.txt', $typeOptions);

echo "<select name='fatherid' onChange='GetSmallType();' style='width:200;'>rn";

echo "<option value='0' selected>--不限栏目--</option>rn";

echo $typeOptions;

echo "</select>";

$ty->Close();

}else{

$typeOptions=cache_get('/cache/bigtype.cache.txt');

echo "<select name='fatherid' onChange='GetSmallType ();' style='width:200;'>rn";

echo "<option value='0' selected>--不限栏目--</option>rn";

echo $typeOptions;

echo "</select>";

}
}

?>