var moveLogoDelayTimer;

$(document).ready(function() {
    $('#divLogo').hover(
                function() {
                    moveLogoDelayTimer = setTimeout("moveLogo()", 300);
                },
                function() {
                    clearTimeout(moveLogoDelayTimer);
                    $(this).animate({ top: '-240px' }, 100);
                }
            );
});
function moveLogo() {
    $('#divLogo').animate({ top: '+=225px' }, 100);
}