jquery on()

        $(document).on(‘click‘, ‘#header .fixed-feedback-bn, #sb-sec .feedback-bn‘, function () { 
            // code... 
        });

$("table.planning_grid").on({ 
    mouseenter: function() { 
        // Handle mouseenter... 
    }, 
    mouseleave: function() { 
        // Handle mouseleave... 
    }, 
    click: function() { 
        // Handle click... 
    } 
}, "td");