<style>
body{color:#333;}
a{color:#333;cursor:pointer}
h1, h2{border-bottom: solid 1.5px #2d74ac; padding-bottom:6px;} 
h1 {font-size:25pt;} h2 {font-size:20pt;}
a:hover{text-decoration:none}
.sidebar-nav{border-bottom: solid 1px #d2d2d2;}
.border-bottom{border-bottom: solid 1px #d2d2d2;}
.bg-nhatkhang{background-color:#2d74ac; color:#fff; border-radius: 3px;}
.text-nhatkhang{color:#2d74ac}
.zoomIt, .pointerAjax, .ajxRemoveCfmBtn, .popUpForm, .nav-item {cursor:pointer}
.pointerAjax:hover {color:#2d74ac;}
button{cursor:pointer}
.bd-callout {padding: 1.25rem; margin-top: 1.25rem; margin-bottom: 1.25rem; border: 1px solid #eee; border-top-width: .25rem; border-top: 3px solid #2d74ac; border-radius: .15rem; background-color:#f6f6f6; }
.panel-title {
	margin-bottom: 9px; padding-bottom:9px;
}
.panel-title > a:before {
	font-family: FontAwesome;
    content: '\f146';
    padding-right: 5px;
	color: #9eca3c;
}
.panel-title > a.collapsed:before {
    font-family: FontAwesome;
    content: '\f196'; /* + */
	color: #333;
}
.btnOnThis {
  position: relative;
}

/* Style the button and place it in the middle of the container/image */
.btnOnThis div {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  display:none;
}

.btnOnThis:hover img{
    opacity:0.2;
}

.btnOnThis:hover div {
    display: block;
}
</style>