.yui3-widget-hidden {
    display:none;
}

.yui3-widget-content {
    overflow:hidden;
}

.yui3-widget-content-expanded {
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    -ms-box-sizing: border-box;
    box-sizing:border-box;
    height:100%;
}

/* Only used for IE6, to go from a bigger size to a smaller size when using cb.sizeTo(bb) */
.yui3-widget-tmp-forcesize {
    overflow:hidden !important;
}