#fade{ /*--Transparent background layer--*/
  display: none; /*--hidden by default--*/
  background: #000;
  position: fixed; left: 0; top: 0;
  width: 100%; height: 100%;
  opacity: .1;
  z-index: 1;
}
.popup_block{
  display: none;
  background: #fff;
  padding: 20px;
  border: 20px solid #ddd;
  float: left;
  position: fixed;
  top: 50%; left: 50%;
  z-index: 2;
  /*--CSS3 Box Shadows--*/
  -webkit-box-shadow: 0px 0px 20px #000;
  -moz-box-shadow: 0px 0px 20px #000;
  box-shadow: 0px 0px 20px #000;
  /*--CSS3 Rounded Corners--*/
  -webkit-border-radius: 10px;
  -moz-border-radius: 10px;
  border-radius: 10px;
}
img.btn_close {
  float: right;
  margin: -55px -55px 0 0;
}
/*--Making IE6 Understand Fixed Positioning--*/
*html #fade {
  position: absolute;
}
*html .popup_block{
  position: absolute;
}