jquery.seek

:: demo page

With easing:http://gsgd.co.uk/sandbox/jquery/easing/

$("#fsForm").seek({ css: { borderStyle: "dotted", 
                           borderWidth: "1px", 
                           borderColor: "Green" },
    animation: { speed: 600 }
});
                    

$("#txtNome, #txtCognome").seek({ 
    css: { borderStyle: "dotted", 
           borderWidth: "1px", 
           borderColor: "Green" },
    animation: { speed: 600 },
    startFrom: $("#fsForm")
});
                    

$("fieldset img").seek({ css: { borderStyle: "solid", 
                       borderWidth: "2px" },
                animation: { easeFunction: "easeInExpo", 
                             speed: 900 },
                multiple: { simultaneous: false, 
                            interval: 300 }
});