This is a part of my script which will close a popup:

2.     $("body:not(#popup)").click(function() { 
3.         if(popup_zustand == true) {
4.             $("#popup").fadeOut("normal");
5.             $("#hintergrund").fadeOut("normal");
6.             popup_zustand = false;
7.         }
8.     }); 

You will find the problem on the first line. I want the popup to get closed whenever I click anywhere but not on the popup itself (that means #popup). The way I did, it closes the popup everytime, even when I click on #popup. 

What am I doing wrong?