using option box, data retrive from .xml and display in txtbox?

[perhapscwk]

I want to use ajax, by selected the option box, retrieve data from a .xml file and fill in to the textbox.

below is the html page

<script src="selectcd.js"></script>

<form> 
Select a CD:
<select name="cds" onchange="showCD(this.value)">
<option value="Bob">Bob</option>
<option value="Bonnie">Bonnie</option>
</select>
</form><p>

<input type="text" name="txtSingerName" id="txtSingerName" size=20 class="stdbox" value="<?php print stripslashes($form_txtSingerName); ?>">
<input type="text" name="txtAlbumName" id="txtAlbumName" size=20 class="stdbox" value="<?php print stripslashes($form_txtAlbumName); ?>">
</p>

below is the .js file

var xmlHttp

function showCD(str)
{ 
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request")
 return
 } 
var url="getcd.php"
url=url+"?q="+str
url=url+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChanged 
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}

function stateChanged() 
{ 
 if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("txtSingerName").value=xmlHttp.responseText 
 document.getElementById("txtAlbumName").value=xmlHttp.responseText 
 } 
}function GetXmlHttpObject()
{
var xmlHttp=null;try
 {
 // Firefox, Opera 8.0+, Safari
 xmlHttp=new XMLHttpRequest();
 }
catch (e)
 {
 // Internet Explorer
 try
  {
  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  }
 catch (e)
  {
  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
 }
return xmlHttp;
}

below is the .php page

<?php
$q=$_GET["q"];

$xmlDoc = new DOMDocument();
$xmlDoc->load("cd_catalog.xml");

$x=$xmlDoc->getElementsByTagName('ARTIST');

for ($i=0; $i<=$x->length-1; $i++)
{
//Process only element nodes
if ($x->item($i)->nodeType==1)
  {
  if ($x->item($i)->childNodes->item(0)->nodeValue == $q)
    { 
    $y=($x->item($i)->parentNode);
    }
  }
}

$cd=($y->childNodes);

for ($i=0;$i<$cd->length;$i++)
{ 
//Process only element nodes
if ($cd->item($i)->nodeType==1)
  { 
  echo($cd->item($i)->nodeName);
  } 
}

?>

But it not works...please help...thanks.. thanks.

[acoder]

When you say it doesn't work, can you be more specific? Are there any errors? If so, what is the message and on what line does it occur?

[perhapscwk]

this part

function stateChanged() 
{ 
 if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("txtSingerName").value=xmlHttp.responseText 
 document.getElementById("txtAlbumName").value=xmlHttp.responseText 
 }

and

for ($i=0;$i<$cd->length;$i++)
{ 
//Process only element nodes
if ($cd->item($i)->nodeType==1)
  { 
  echo($cd->item($i)->nodeName);
  } 
}

should be incorrect,,,

how to use Ajax to display xml data and show it in different textbox?

thanks.

[acoder]

You're setting the whole responseText to both text fields.

Either parse the XML file in your PHP code to produce the information you need in a format that can be parsed with JavaScript, e.g. using a unique delimiter, or return a valid XML file, which can be parsed using the XML DOM - use getElementsByTa gName(tagName) to get the necessary information.

[perhapscwk]

i using below but when i choose the opt box, it just chnage the textbox to blank.

[code]

<?php
$q=$_GET["q"];

$xmlDoc = new DOMDocument();
$xmlDoc->load("cd_catal og.xml");

$x=$xmlDoc->getElementsByT agName('ARTIST' );

for ($i=0; $i<=$x->length-1; $i++)
{
//Process only element nodes
if ($x->item($i)->nodeType==1)
{
if ($x->item($i)->childNodes->item(0)->nodeValue == $q)
{
$y=($x->item($i)->parentNode);
}
}
}

$cd=($y->childNodes);

for ($i=0;$i<$cd->length;$i++)
{
//Process only element nodes
if ($cd->item($i)->nodeType==1)
{
echo($cd->item($i)->nodeName);
}
}

?>

the xml file i using the simple xml format.

<CATALOG>
	<CD>
		<TITLE>Empire Burlesque</TITLE>
		<ARTIST>Bob Dylan</ARTIST>
		<COUNTRY>USA</COUNTRY>
		<COMPANY>Columbia</COMPANY>
		<PRICE>10.90</PRICE>
		<YEAR>1985</YEAR>
	</CD>
	<CD>
		<TITLE>Hide your heart</TITLE>
		<ARTIST>Bonnie Tyler</ARTIST>
		<COUNTRY>UK</COUNTRY>
		<COMPANY>CBS Records</COMPANY>
		<PRICE>9.90</PRICE>
		<YEAR>1988</YEAR>
	</CD>
</CATALOG>

i want to use ajax and when i choose a artist from option box, it will return 2 values in 2 different textbox such as artist name and maybe company name.

please help..

thanks so much.

[acoder]

Your problem might be that "Bob" doesn't match "Bob Dylan".

First check if your PHP works by giving it the string "?q=Bob", i.e. execute the PHP file "getcd.php?q=Bo b" and see what the output is.