QPushButton
{
    border:0px; 
    image:url(ui/images/bcancel.png);
}
QPushButton:hover
{
    image:url(ui/images/bcancel_hover.png);
}
QPushButton:pressed
{
    image:url(ui/images/bcancel_down.png);
}
QPushButton:disabled
{
    image:url(false.png);
}