<?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"];
$db1->query("select * from news_sclass where parentid='$parentid' order by parentid desc");
while($db1->next_record()){
$nums=$db1->num_rows();
$j++;
$sValue.="\"".$db1->Record["id"]."\",";
if($j==$nums){
$sValue="[".$sValue."],[";
$j=0;
}
}
}
$sValue.="]";
$sValue=str_replace("\",]","\"]",$sValue);
$sValue=str_replace(",[]","]",$sValue);
if((substr($sValue,0,2))=="[\""){
$sValue="[".$sValue;
}else{
$sValue=preg_replace("/\[{3,}/is","[[\\1",$sValue);//匹配
}

?>
<div id="tar"></div>
<SCRIPT LANGUAGE="JavaScript" DEFER>
var fMenu = <?php echo $fMenu; ?>;
var fValue = <?php echo $fValue; ?>;
var sMenu = <?php echo $sMenu; ?>;
var sValue = <?php echo $sValue; ?>;

var oWhere = document.all.tar;
var ofMenu = document.createElement("<SELECT name='bigclass'>");
var osMenu = document.createElement("<SELECT name='smallclass'>");
with(oWhere)appendChild(ofMenu),appendChild(osMenu);

createMainOptions();
createSubOptions(0);

ofMenu.onchange = function() {createSubOptions(this.selectedIndex);};

function createMainOptions() {
for(var i=0;i<fMenu.length;i++)ofMenu.options[i] = new Option(fMenu[i],fValue[i]);
}
function createSubOptions(j) {
with(osMenu) {
length=0;
for(var i=0;i<sMenu[j].length;i++)osMenu.options[i] = new Option(sMenu[j][i],sValue[j][i]);
}
}
&