.ui-tabs-nav a.ui-tabs-close {
    position: absolute;
    top: 2px;
    right: 2px;
    cursor: pointer !important;
    opacity: 0.4;
    -moz-opacity: 0.4;
    filter: alpha(opacity=40);
}

.ui-tabs-nav .ui-tabs-selected a.ui-tabs-close {
    z-index: 2;
    opacity: 0.7;
    -moz-opacity: 0.7;
    filter: alpha(opacity=70);
}

.ui-tabs-nav a.ui-tabs-close {
    background-image:url(/prx/000/http/bugs.jqueryui.com/raw-attachment/ticket/3924/window-close.png);
    height: 16px ;
    width: 16px ;
    padding: 0 !important;
}

.ui-tabs-nav a.ui-tabs-close:hover {
    opacity: 1.0;
    -moz-opacity: 1.0;
    filter: alpha(opacity=100);
}

.ui-tabs-nav a.ui-tabs-close span {
    display: none ;
}