jquery

animation.js

$("#bar") 
    .css({ 
            "background":"yellow", 
            "border":"1px solid black" 
        }) 
    .hide(2000,function(){ 
            console.log("Animation complete!"); 
        });
$("#bar") 
    .css({ 
            "background":"yellow", 
            "border":"1px solid black" 
        }) 
    .show(2000,function(){ 
            console.log("Animation complete!"); 
        });