#s3slider { 
   width: 377px; /* important to be same as image width */ 
   height: 235px; /* important to be same as image height */
   position: relative; /* important */
   overflow: hidden; /* important */
}

#s3sliderContent {
   width: 377px; /* important to be same as image width or wider */
   position: absolute; /* important */
   top: 0; /* important */
   margin: 0;
   padding: 0;
}

.s3sliderImage {
   float: left; /* important */
   height: 235px;
   position: relative; /* important */
   display: none; /* important */
}

.s3sliderImage span {
   position: absolute; /* important */
   font: 12px Arial, Helvetica, sans-serif;
   padding: 10px 13px; 
   width: 350px;
   background-color: #CC007A;
   filter: alpha(opacity=90); /* here you can set the opacity of box with text */
   -moz-opacity: 0.9; /* here you can set the opacity of box with text */
   -khtml-opacity: 0.9; /* here you can set the opacity of box with text */
   opacity: 0.9; /* here you can set the opacity of box with text */
   color: #fff;
   display: none; /* important */
   bottom : 0px;
   

<!--[if IE 6]>

.s3sliderImage span { height: 45px; }  

<![endif]-->   
   /*
       if you put
       top: 0; -> the box with text will be shown at the top of the image 
       if you put
       bottom: 0; -> the box with text will be shown at the bottom of the image
   */
}