.bg15 body {

  padding-bottom: 40px;
  background: url(../../../images/background/background_web.jpg) top center no-repeat fixed;
  -webkit-background-size: cover; /* Safari en Chrome */
  -moz-background-size: cover; /*  Old Firefox */
  -o-background-size: cover; /* Opera */
  background-size: cover; /* W3C */
}
#t3-mainbody
{
  border: 1px #e4e4e4 solid;
  padding: 20px;
  border-radius: 4px;
  box-shadow: 0 0 15px #000;
  background-color: #fff;
  opacity: 0.8;
}