ajax help

[jangkoo]

Hi,
I am trying an ajax technique to insert data but it doesn't work.
here is the code
The purpose is that insert the message of a chatbox to db

<?php

echo"<form  name='chat'>";
if (!isset($_COOKIE["user"])|| $_COOKIE["user"]=="")
{
    echo "Your name";
echo "<input type='text' size=20 id='name'>";
}
echo "<textarea cols='21' rows='5' id='message' >Write here</textarea>";
echo "<input onclick='loadContent()' style=' background-color:#0F6' name='CHAT' type='submit' value='CHAT' />";
echo "</form>";
?>

<script type="text/javascript" >
        function loadContent(){
            //Browsers support
        xmlhttp=new XMLHttpRequest();
        var name=document.getElementById("name").value;
        var message=document.getElementById("message").value;
        xmlhttp.open("GET","chatbox.php",true);
        xmlhttp.send(null);
        document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
            }
</script>

<?php
header("location: index.php");
include ("dbconnect.php");
/*if(isset($_POST['CHAT']))
{
if (!isset($_COOKIE["user"])|| $_COOKIE["user"]=="")
{
    if ($_POST['name']==NULL) exit();
    else 
    $username=$_POST['name'];
    }
    else 
    {
        $username=$_COOKIE["user"];
    }
    $message=$_REQUEST['message'];*/
    $name=$_GET["name"];
    $message=$_GET["message"];
    $date=date("d/ m h:i");
$query="insert into chatbox(username,chat,time) values ('$username','$message','$date')";
mysql_query($query) or die(mysql_error());

}
?>

[bluewalrus]

I think your problem is your ajax request.

xmlhttp.open("GET","chatbox.php",true);

should be

xmlhttp.open("GET","chatbox.php?name=" + name + "&message=" + message,true);

Actually you should move the header down to the end of the process as well.

<?php
include ("dbconnect.php");
/*if(isset($_POST['CHAT']))
{
if (!isset($_COOKIE["user"])|| $_COOKIE["user"]=="")
{
    if ($_POST['name']==NULL) exit();
    else 
    $username=$_POST['name'];
    }
    else 
    {
        $username=$_COOKIE["user"];
    }
    $message=$_REQUEST['message'];*/
    $name=$_GET["name"];
    $message=$_GET["message"];
    $date=date("d/ m h:i");
$query="insert into chatbox(username,chat,time) values ('$username','$message','$date')";
mysql_query($query) or die(mysql_error());
//}
header("location: index.php");
?>