html{
	width:100%;
	height:100%;
}
body{
	margin:0;
	width:100%;
	height:100%;
	min-width:980px;
}

#main{
	position:relative;
}
#bg{
	position:absolute;
	left:0;top:0;
	width:500px;height:500px;
}

#txt{
	position:absolute;
	left:0;top:0;
	width:490px;height:500px;
	line-height:14x;
	font-size:14px;
	font-family: "Trebuchet MS", Tahoma;
	z-index:100;
}
span.c1{
	z-index:100;
	background:#fff;
}
span.x span.c1{
	visibility:hidden;
}