#banner{   
	position: absolute;   
}  

.oneByOne1{ 	
	margin: 20px 0 20px 0;
	width: 940px;
	height: 235px;   
	position: relative;
	overflow: hidden;
	float:left;

}   

#banner .oneByOne_item{
	position: absolute;
	width: 940px;
	height: 235px;   
	overflow: hidden;  
}
#banner .oneByOne_item img{
	position: absolute;
	top: 0; 
	left: 0;
}