Question

I have a button with onclick="sendNews()" and a PHP script which does the database work.
The problem is that the $_POST array is empty when sendNews runs.

Javascript:

function sendNews()
{
    var title=document.getElementById("title").innerHTML;
    var body=document.getElementById("boddy").innerHTML;
    var params="title="+title+"&body="+body;
    var xmlhttp;
    if (window.XMLHttpRequest)
    {// code for IE7+, Firefox, Chrome, Opera, Safari
      xmlhttp=new XMLHttpRequest();
    }
    else
    {// code for IE6, IE5
      xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }

    //Send the proper header information along with the request    
    xmlhttp.open("POST","sendnews.php",true);
    xmlhttp.send(params);
    xmlhttp.onreadystatechange=function(){
        if (xmlhttp.readyState==4 && xmlhttp.status==200)
        {
            document.getElementById("newsAddResult").innerHTML=xmlhttp.responseText;
        }     
    }
}

PHP:

<?php
include("../inc/functions.php");
if(!loginCheck())
    header('Location: index.php');

$title=@$_POST['title'];
$body=@$_POST['body'];
var_dump($_POST);
$q=sprintf("insert into `news`(`id`,`title`,`body`,`time`) values(NULL,'%s','%s','%s')",$title,$body,jgmdate('l jS F Y h:i:s A'));
mysql_query($q) or die("خطا".mysql_error());
echo "با موفقیت ارسال شد";

?>

Where’s the problem?

Answer 1

Edited to correct errors in the code and to make it compatible with more browsers.
Thanks to @Mr. BeatMasta and @Felix Kling for setting me straight on placement of onreadystatechange, sending the header, and browser compatibility issues.

.
Javascript:

function sendNews()
{
    var title=document.getElementById("title").innerHTML;
    var body=document.getElementById("boddy").innerHTML;

    var params="title="+title+"&body="+body;

    var xmlhttp;
    if (window.XMLHttpRequest)
    {// code for IE7+, Firefox, Chrome, Opera, Safari
      xmlhttp=new XMLHttpRequest();
    }
    else
    {// code for IE6, IE5
      xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }

    //Send the proper header information along with the request    
    xmlhttp.open("POST","sendnews.php",true);

    xmlhttp.onreadystatechange=function(){
        if (xmlhttp.readyState==4 && xmlhttp.status==200)
        {
            document.getElementById("newsAddResult").innerHTML=xmlhttp.responseText;
        }     
    }

    xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");

    xmlhttp.send(params);
}

In your php you have:

$title=@$_POST['title'];
$body=@$_POST['body'];

That should be:

$title = $_POST['title'];
$body = $_POST['body'];