Drop-down menu-for PHP two drop-down list linkage solution.

PHP drop-down menu database

Select department, the corresponding employee name according to the selected departments to obtain, how to do.
Two List of codes:

```

echo "-Please select-";
@include "conn.php"; Link Database
$gzh _num_result=mysql_query ("Select Gzh_num, Gzh_name from Gongzhong where gzh_renum=0 order by gzh_num;");
while ($gzh _num_row=mysql_fetch_array ($gzh _num_result))
{

List ($gzh _num, $gzh _name) = $gzh _num_row;

    echo "".$gzh_name."  ";        //  echosuboption($gzh_num,@$_GET['gzh_num']);};?>               echo "-请选择-  ";      
   
       ".$yg_name."  ";};?>

