.double_slider {
  position:relative;
  /*
  -moz-user-select: none;
  -khtml-user-select: none;
  */
  user-select: none;
  -o-user-select:none;
  -moz-user-select: none;
  -khtml-user-select: none;
  -webkit-user-select: none; 
}

.double_slider .slides {
  width:100%;
  height:100%;
  top:0;
  left:0;
  position:absolute;
  overflow:hidden;
  z-index:1;
}

.double_slider .slide1 {
  position:absolute;
  z-index:1;
  left:0;
  top:0;
  font-size:0px;
  overflow:hidden;
}

.double_slider .slide1 img {
 
}

.double_slider .slide2 {
  position:absolute;
  z-index:1;
  left:0;
  top:0;
  font-size:0px;
  overflow:hidden;
}

.double_slider .slide2 img {
  position:relative;
  left:0;
}

.double_slider .slider_but {
  position:absolute;
  top:0;
  left:0;
  width:1px;
  height:100%;
  background:#51c1d7;
  z-index:10;
}

.double_slider .slider_but .slider_but_item {
  width:41px;
  height:56px;
  position:absolute;
  background:url(images/slider/double_slider_but.png) no-repeat left top;
  top:50%;
  margin-top:-28px;
  left:0;
  margin-left:-20px;
  cursor:pointer;
}