css3 弹框提示样式

.common-dialog-box{
	opacity: 0;
	filter: alpha(opacity=0);
	position: fixed;
	top: 0%;
	left: 50%;
	z-index: 1000;
	 500px;
	height: 50px;
	line-height: 50px;
	margin-left: -250px;
	border-radius: 3px;
	background-color: #fff;
	overflow: hidden;
	visibility: hidden;
	transition: all 0.5s;
	-ms-transition: all 0.5s;
}
.common-dialog-box.show{
	visibility: visiblel;
	opacity: 0.7;
	filter: alpha(opacity=70);
	top: 1%;
}
.common-dialog-box .common-dialog-body{
	color: #fff;
	text-align: left;
}