.btn_submenu{
    display:none;
    width:130px;
    position:absolute;
/*    border:1px solid grey;*/
    z-index: 10000;
    padding-bottom: 3px;
}
.btn_submenu .dd_content{
    position:relative;
    top:0;left:0;z-index:10;
    
}
.btn_submenu .dd_background{
    position:absolute;
    top:0;left:0;
    background-color:black;
    width:100%;
    height:100%;
    filter: alpha(opacity=50); 
        -moz-opacity: 0.5;
    opacity: 0.5;    
    z-index:1
}
.btn_submenu a{
    display:block;
    color:#fff;
    padding:10px 5px;
}
.btn_submenu a{position:relative;}
.btn_submenu ul{color:#fff;position:absolute;padding:0;margin:0;width:100%;left:130px;top:0;display:none;z-index:5}
.btn_submenu li{position:relative;list-style: none;margin:0;padding:5px;z-index:5}
.btn_submenu a:hover,.btn_submenu li:hover{background:#E8E8E8;color:#0086B8;}
.btn_submenu li span{display:block}