table{
			  -webkit-touch-callout: none; /* iOS Safari */
			  -webkit-user-select: none;   /* Chrome/Safari/Opera */
			  -khtml-user-select: none;    /* Konqueror */
			  -moz-user-select: none;      /* Firefox */
			  -ms-user-select: none;       /* Internet Explorer/Edge */
			  user-select: none;           /* Non-prefixed version, currently
											  not supported by any browser */
			}
			.head{
				background-color:gray;
				color: white;
				border:0px;
			}
			td{
				border:1px solid gray;
				text-align:center;
				padding:5px;
				font-size: 90%;
			}
			tr:hover{
				background-color:lightgray;
			}
			.img_dxf{
				opacity:0.5;				
			}
			.img_dxf:hover{
				cursor:pointer;
				opacity:1;				
			}