#slider { 
   width: 700px; /* important to be same as image width */ 
   height: 392px; /* important to be same as image height */
   position: relative;
}

#slider img { width: 700px; }

#slider ul { list-style: none; }

#sliderContent {
   width: 700px; /* important to be same as image width or wider */
   position: absolute; /* important */
   top: 0; /* important */
   margin-left: 0; /* important */
}

.sliderImage {
   float: left; /* important */
   position: relative; /* important */
   display: none; /* important */
   width: 700px;
   height: 392px;
}

.sliderImage span {
   position: absolute; /* important */
   left: 0;
   font: 10px/15px Arial, Helvetica, sans-serif;
   padding: 10px 13px;
   width: 400px;
   height: 25px;
   background-color: #000;
   filter: alpha(opacity=70); /* here you can set the opacity of box with text */
   -moz-opacity: 0.7; /* here you can set the opacity of box with text */
   -khtml-opacity: 0.7; /* here you can set the opacity of box with text */
   opacity: 0.7; /* here you can set the opacity of box with text */
   color: #fff;
   display: none; /* important */
   top: 0;
}