[jQuery] searching css id

[Sharique]

Hi,
What I'm trying to is that  when there is certain css   id appears in
area. then it should hide right sidebar and change the width of center
area.

if($('#specialSection'))
{
        $('#sidebar-right').hide();
        $('#center').css('width','760px');
}

But this code is not working properly. It hides right sidebar on every
page.