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<html>
<head>
<script src="js/jquery.js" language="javascript"></script>
<style>
ul.submenu{display:none;}

</style>
<script type="text/javascript">
//處理摺疊效果的JQ
$(function(){
    $(".menu a").click(function(){
        var _this=$(this);
        if(_this.next("ul").length>0){
                _this.html(_this.html()).next().toggle("20000");
            return false;
        }
    });
    $("a").focus( function(){
        $(this).blur();
    });
});
</script>

<script type="text/javascript">
//處理AJAX的JS
function showCustomer(str)
{
var xmlhttp;
if (str=="")
  {
  document.getElementById("txtHint").innerHTML="";
  return;
  }
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
    }
  }
//下拉式選單選了以後, 把值塞到另一個dbs.php, 回傳DB中撈出來的資料
//但是這資料很長, 所以想要可以摺疊,
//我以為只要回傳的內容可以搭配上面的摺疊JQ就可以達到折疊的效果
xmlhttp.open("GET","dbs.php?project_id="+str,true);
xmlhttp.send();
}

</script>
</head>
<body>

//以下產生下拉式選單
<form action="">
<select name="customers" onchange="showCustomer(this.value)">
<option value="">Select a customer:</option>
<?php
$father_proj_name = array();
function preparation()
{
    global $father_proj_name;
    $prepare_SQL = "SELECT * FROM `projects`";
    $prepare_result = mysql_query($prepare_SQL) or die("Query error in preparation father_proj_id");
    while($row = mysql_fetch_array($prepare_result))
    {
        if (is_null($row[parent_id]))
        {
            $father_proj_name[$row[name]] = $row[id];
        }
    }
}
//for DB connection
$dbhost = 'localhost';
$dbuser = 'redmine_admin';
$dbpass = 'caswell';
$dbname = 'redmine_test';
$conn = mysql_connect($dbhost, $dbuser, $dbpass) or die('Error with MySQL connection');
mysql_select_db($dbname);
preparation();

while (list($key, $val) = each($father_proj_name)) {
    echo "<option value="$val">$key</option>";
}
//以上產生下拉式選單
?>

</select>
</form>
<br />
<div id="txtHint">Customer info will be listed here...</div>

</body>
</html>