QPushButton
{
    border:0px; 
    background-image: url(data/UI/images/save.png);
}
QPushButton:hover
{
    background-image: url(data/UI/images/save_hover.png);
}
QPushButton:pressed
{
    background-image: url(data/UI/images/save_down.png);
}
QPushButton:disabled
{
    background-image: url(data/UI/images/save_disabled.png);
}