.asyncButton {
    border: 0px;
    background-image: url("images/greyButton.gif");
    background-repeat: no-repeat;
    width: 120px;
    height: 25px;
}
.asyncButton:hover {
    background-image: url("images/greyButtonHov.gif");
    background-repeat: no-repeat;
    cursor: pointer;
}