.slide_ant {
	background-image:		url('../images/slide.jpg') ;
	background-position:		0 0 ;
	width:				26px ;
	height:				26px ;
}
.slide_ant:hover {
	background-position:		0 -26px ;
}
.slide_sig {
	background-image:		url('../images/slide.jpg') ;
	background-position:		-26px 0 ;
	width:				26px ;
	height:				26px ;
}
.slide_sig:hover {
	background-position:		-26px -26px ;
}