actions in a list happen at once

actions in a list happen at once

how can i make the actions happen all together at the same time,  not in a series
for instance this code will show the balloon first which takes 100th of a second then go to the next list
i want this list to happen at once

  1. $("li.il2, li.sw2").click(function () {
            $("#balloon").show(100);
            $("li.il2").animate({backgroundPosition: '0 -17px'})
        });