<style type="text/css">
  #mainDiv
  {
    background-color: #EFEFEF;
    border: 1px solid #000000;
    margin: 10px;
    padding: 14px;
    width: 95%;
  }
  #transparentDiv
  {
    filter:alpha(opacity=70);
    opacity:0.7;
    background-color:#404040;
    z-index:1000;
    position:absolute;
    top:0px;
    left:0px;
    display:none;
  }
  #dialogDiv
  {
    background-color: red;
    border: 1px solid #000000;
    margin: 10px;
    padding: 14px;
    position:absolute;
    z-index:2000;
    display:none;
  }
</style>