一个用数据库的php二级联动

<?php
/*******************************************
**********功能：php二级联动菜单*************
**********作者:冲星*************************
**********Email:njj@nuc.edu.cn**************
**********日期：2004/10/02******************
**********请转载时保留版权信息**************
*******************************************/

require_once(''db.inc.php'');//数据库连接
$db=new hq_online;
$db1=new hq_online;
$db->query("select * from news_bclass order by id desc");
$fMenu="";
$fValue="";
while($db->next_record()){
$fMenu.="\"".$db->Record["bname"]."\",";
$fValue.="\"".$db->Record["id"]."\",";

}
$fMenu=substr($fMenu,0,(strlen($fMenu)-1));
$fMenu="[".$fMenu."]";//*****************************得到var fMenu
$fValue=substr($fValue,0,(strlen($fValue)-1));
$fValue="[".$fValue."]";//*****************************得到var fValue

//得到*****************************var sMenu
$db->query("select * from news_bclass order by id desc");
while($db->next_record()){
$parentid=$db->Record["id"];
$db1->query("select * from news_sclass where parentid=''$parentid'' order by parentid desc");
while($db1->next_record()){
$num=$db1->num_rows();
$i++;
$sMenu.="\"".$db1->Record["sname"]."\",";
if($i==$num){
$sMenu="[".$sMenu."],[";
$i=0;
}
}
}
$sMenu.="]";
$sMenu=str_replace("\",]","\"]",$sMenu);
$sMenu=str_replace(",[]","]",$sMenu);
if((substr($sMenu,0,2))=="[\""){
$sMenu="[".$sMenu;
}else{
$sMenu=preg_replace("/\[{3,}/is","[[\\1",$sMenu);//匹配
}

//得到*****************************var sValue
$db->query("select * from news_bclass order by id desc");
while($db->next_record()){
$parentid=$db->Record["id"];
$db1->query("select * from news_sclass where parent

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