jQuery('#one:not(.test)').css('background-color', '#fcc');
I should have red background!
jQuery('#two:not(div.test)').css('background-color', '#beb');
I should have green background!
jQuery('#three:not(p.test)').css('background-color', '#ccf');
I should have blue background!
jQuery('#three').not('p.test').css('background-color', '#eeb');
I should have yellow background!