.unselectable {
	-moz-user-select:none;
	-webkit-user-select:none;
}
.tip{
	display:none;
	padding:5px;
	border:1px solid #EBECED;
	color:#edeef0;
	font-weight: bold;
	z-index:1000;
	float:left;
	position:absolute;
	top:0;
	left:0;
	/*gradient color*/
	background:#000;
	filter:  progid:DXImageTransform.Microsoft.gradient(startColorstr='#494949', endColorstr='#656565'); /* IE6,IE7 */
	-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr='#494949', endColorstr='#656565')"; /* IE8 */ 
	background-image: linear-gradient(to bottom, #494949 0%, #656565 100%);/* IE10 */ 
	background: -moz-linear-gradient(top, #494949,#656565); /* Firefox */
	background: -webkit-gradient(linear, 0 0, 0 100%, from(#494949), to(#656565));
	word-break:keep-all;
	white-space:nowrap;
}