I think you should look for problem on client side (html/javascript) since your code is working ok with other than IE7 browsers. Looks like IE forces double click for some reason. Try disabling post button using Javascript as soon as it is clicked.

Well thanks for the advice but i am using an image button, could this be a reason or buy in IE7?

if($_SESSION['edit_ad']!= "")
$sql = "UPDATE `ads` SET `name` = '".$_SESSION["name"]."' ..... where id = '".$_SESSION['edit_ad']."' LIMIT 1";
else
$sql = "INSERT INTO `ads` ( `name` , ......)
VALUES ( '".$_SESSION["name"]."' , ....)";

It looks like regardless of the condition your script is executed twice (once for each cond)
try
elseif($_SESSION['edit_ad']== "")
{
$sql = "INSERT INTO `ads` ( `name` , ......)
VALUES ( '".$_SESSION["name"]."' , ....)";
}

i tried it, but it still creates 2 records!

it even looks like this now:

if($_SESSION['edit_ad']!= "")
{
$sql = "UPDATE(....)";
}
else
if($_SESSION['edit_ad'] == "")
{
$sql = "INSERT(....)";
}

if(mysql_query($sql))
{
session_write_close();
header("Location: confirm");
exit;
}

I have a "procedural" idea
reverse the process:

Firstly start by checking if it exists

if not perform an insert and exit()
if yes then it is an update

I use some javascript to disbale the submit butons/images after they are clicked, stops the double-click problem.

Likely that your form post and the image-button handler are both posting the data so the above may not work

"the above may not work"

You mean your solution or the solution above it?

am sorry am out of town so i cant try both solutions now, so i was just wondering which solution did u mean?

Thanks

Thanks for the solutions..

I got it working finally..

I was submitting the form when the image was clicked, thought the image acts as submit by default (which i didn't know)

But it was strange that it worked like that just in IE