jquery add remove class onclick

Question

i have any navigation menu !

   

    

    
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Answer 1

On the assumption that you want to have only one element of class-name selected I suggest:

$('ul.navigation li a').click(
    function(e) {
        e.preventDefault(); // prevent the default action
        e.stopPropagation(); // stop the click from bubbling
        $(this).closest('ul').find('.selected').removeClass('selected');
        $(this).parent().addClass('selected');
    });

JS Fiddle demo.