#slider-container 
{
    position: relative; 
    left: 0;
}

.nivoSlider {
    position:relative;
    width:800px; /* Change this to your images width */
    height:340px; /* Change this to your images height */
    background:url(images/loading.gif) no-repeat 50% 50%;
}
.nivoSlider img {
    position:absolute;
    top:0px;
    left:0px;
    display:none;
}
.nivoSlider a {
    border:0;
    display:block;
}