CODE EXAMPLE FOR CSS

set opacity except one

.opacityFader {
  filter:alpha(opacity=90); /* IE */
  -moz-opacity:0.9; /* Mozilla */
  opacity: 0.9; /* CSS3 */
  position: absolute;
}

<div class="opacityFader"></div>
<div class="contentWithBluryBG">
 Things come here
</div>