ajax post request to php without response (isset every time false) - php

Question

I'm using jquery multiselect plugin and I want to perform an ajax request on a select/deselect event.
My problem: When I send the request to the php file, ISSET(VAR) returns every time false so that I can't pass variable to the php file.
But Firebug extension for Chrome/Firefox shows me that the POST value is set right POST -> "Response myvar" but GET is empty.
How do I pass the variable to the php file?
(I've searched arround the web but found nothing.)
My script, where this pointer is from the multiselect plugin and afterSelect returns if a object is selected
afterSelect: function()
{
this.qs1.cache();
this.qs2.cache();
count++;
var dataString = "count=" + count;
if ( count > 0 )
{
$.ajax
({
type: 'POST',
url: 'page-to-send-request.php',
data: dataString,
success: function()
{
$("#div-to-load").load("page.php #div-to-load").fadeIn('slow');
},
error: function (xhr, ajaxOptions, thrownError)
{
alert(xhr.status);
alert(thrownError);
}
});
}
},
The php page to load has for test only
if($_POST['count'])
{
$count = $_POST['count'];
echo "Count " .$count;
}
else{ echo "FALSE"; }
Expected result should be
Count 5
But real output is
FALSE

Answer 1

1st try
success: function(data)
{
console.log(data);
},
it should output "Count " .$count; if not
try to use
var dataString = {count: count};
and then you can use
$("#div-to-load").html(data).fadeIn('slow');
the reason of return false .. you used the .load to load the php page .. when you load it .. javascript know it as a separated page .. so $_POST['count'] is undefined in this case . and It will return False always
your success function should be like this
success: function(data)
{
$("#div-to-load").html(data).fadeIn('slow');
},