@media screen and  (max-width:900px) {

  #showcase_3 { display: none; }  
  #showcase_4 { display: none; }  
  #showcase_5 { display: none; } 
}

@media screen and (min-width:901px) and (max-width:1040px) {
  #showcase_3 { display: block; }  
  #showcase_4 { display: none; }  
  #showcase_5 { display: none; } 
}

@media screen and (min-width:1041px) and (max-width:1279px) {
  #showcase_3 { display: block; }  
  #showcase_4 { display: block; }  
  #showcase_5 { display: none; } 
}

@media screen and (min-width:1280px) and (max-width:1900px) {
  #showcase_3 { display: block; } 
  #showcase_4 { display: block; } 
  #showcase_5 { display: block; } 
}

.showcaseBackground 
{
    border:1px solid #cccccc;
    font-size:12px;
    }