div.slider4{width: 940px; height: 334px; overflow: hidden; position: relative; background: #000;}
	div.slider4 a.sl_but{position: absolute; display: block; background: url('images/arrows.png') no-repeat; z-index: 999; top: 37%; width: 73px; height: 73px;}
		div.slider4 a.sl_but.l{left: 0px; background-position: top left;}
		div.slider4 a.sl_but.l:hover{background-position: bottom left;}
		div.slider4 a.sl_but.r{right: 0px; background-position: top right;}
		div.slider4 a.sl_but.r:hover{background-position: bottom right;}
		div.slider4 div.img_item{width: 940px; top: 0px; left: 0px; position: absolute; z-index: 10;}