$('document').ready(function() {
    $('.jqHeader').click(function() {
        if($(this).parents('.art-title').parents('.article').children('.art-text').css('display') == 'none') {
            $(this).parents('.art-title').parents('.article').children('.art-text').slideDown();
            $('.jqHeader').not(this).parents('.art-title').parents('.article').children('.art-text').slideUp();
        }
        else {
            $(this).parents('.art-title').parents('.article').children('.art-text').slideUp();
        }
        return false;
    });
})