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Hi,
I set this code in Page_load of the listpage in order to hide a div with id="fmad"

function Page_Load()
{
$('#fmad').hide();
}

but I get js error

Anyone can help please?

1. Page_Load() is server event, not JavaScript,
2. When the server event is fired, there is no HTML yet.
3. You should use client side Startup Script.

You should put the jQuery code under Client Scripts -> Startup Script that belongs to the current page, and not in the server event.

It works well, tnx
but when I set this:

$user_level = CurrentUserLevel();
if($user_level == 0 {
$('#fmad').hide();
}
else
{
$('#fmad').show();
}

the div is showing independently of the user level

CurrentUserLevel() is PHP, you cannot mix server side PHP code into client side JavaScript, you should output it by, e.g. <?= CurrentUserLevel() ?>. (Note that you have syntax error also.)

You may try:

$user_level = <?= CurrentUserLevel() ?>;
if ($user_level == 0) {
    $('#fmad').hide();
} else {
    $('#fmad').show();
}

Thank You, it works