input.overlay_box_buttons {
    width: 40px; height: 40px;                                   
    background-size: 40px 40px;
    -moz-background-size: 40px; 40px;
    -webkit-background-size: 40px 40px;
    background-color: transparent;
    background-repeat: no-repeat; 
    border: none;
    }

#overlay_box_button_abort {
    background-image: url('../images/overlay_box/abort.png'); 
    -ms-filter: "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/overlay_box/abort.png',sizingMethod='scale')";                            
    filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/overlay_box/abort.png',sizingMethod='scale');
    }

#overlay_box_button_ok {
    background-image: url('../images/overlay_box/ok.png'); 
    -ms-filter: "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/overlay_box/ok.png',sizingMethod='scale')";                            
    filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='images/overlay_box/ok.png',sizingMethod='scale');
    width: 60px; height: 60px;                                   
    background-size: 60px 60px;
    -moz-background-size: 60px; 60px;
    -webkit-background-size: 60px 60px;
    }