.SysButton
{
    cursor: pointer;
    background: url(../../Images/Button/SysButton.png) no-repeat center top;
    _background:none;
    _filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='/Login/Images/Button/SysButton.png');
}
.Buttton
{
    cursor: pointer;
    background: url(../../Images/Button/ButtonRed.gif) no-repeat center top;
}
.Buttton:hover
{
    cursor: pointer;
    background: url(../../Images/Button/ButtonRed.gif) no-repeat center bottom;
}