pre {
	margin: 0 auto;
	width: 500px;
	overflow: auto;
	padding: 5px;
	border: 1px solid #ccc;
	}
.tip {
	padding: 5px 5px 5px 50px;
	border: 1px solid #c66;
	background-repeat: no-repeat;
	background-position: 5px 5px;
	}