.min_max{
	/*border: 1px solid black;*/
	position: relative;
	top:-2%; 
	display: none;
	height: 25px;
	width: 25px;
	/*background-color: #4CAF50;*/
	/*border-radius: 50%;*/
	font-size: 11pt;
 	font-family: tahoma;
 	text-align: center;
 	float: left;
 	z-index: 10;
}

.min_max:hover{
	cursor: zoom-in;
}