jQuery  focus figure effect.

javascript

$(function() {
	var sWidth = $("#focus").width(); 
	var len = $("#focus ul li").length; 
	var index = 0;
	var picTimer;
	
	var btn = "<div class='btnBg'></div><div class='btn'>";
	for(var i=0; i < len; i++) {
		btn += "<span>" + (i+1) + "</span>";
	}
	btn += "</div>"
	$("#focus").append(btn);
	$("#focus .btnBg").css("opacity",0.5);
	

	$("#focus .btn span").mouseenter(function() {
		index = $("#focus .btn span").index(this);
		showPics(index);
	}).eq(0).trigger("mouseenter");

	$("#focus ul").css("width",sWidth * (len + 1));
	
	$("#focus ul li div").hover(function() {
		$(this).siblings().css("opacity",0.7);
	},function() {
		$("#focus ul li div").css("opacity",1);
	});
	
	$("#focus").hover(function() {
		clearInterval(picTimer);
	},function() {
		picTimer = setInterval(function() {
			if(index == len) { 
				showFirPic();
				index = 0;
			} else {
				showPics(index);
			}
			index++;
		},3000); 
	}).trigger("mouseleave");
	
	function showPics(index) { 
		var nowLeft = -index*sWidth; 
		$("#focus ul").stop(true,false).animate({"left":nowLeft},500); 
		$("#focus .btn span").removeClass("on").eq(index).addClass("on")
	}
	
	function showFirPic() { 
		$("#focus ul").append($("#focus ul li:first").clone());
		var nowLeft = -len*sWidth;
		$("#focus ul").stop(true,false).animate({"left":nowLeft},500,function() {
			$("#focus ul").css("left","0");
			$("#focus ul li:last").remove();
		}); 
		$("#focus .btn span").removeClass("on").eq(0).addClass("on");
	}
});

html

<div class="wrapper">
	<h1>jQuery focus images</h1>

	<div id="focus">
		<ul>
			<li>
				<div style="left:0; top:0; width:560px; height:380px;"><a href="#" target="_blank"><img src="img/a01.jpg" alt="" /></a></div>

				<div style="right:0; top:0; width:220px; height:140px;"><a href="#" target="_blank"><img src="img/a02.jpg" alt="" /></a></div>
				<div style="right:0; top:140px; width:220px; height:140px;"><a href="#" target="_blank"><img src="img/a03.jpg" alt="" /></a></div>
				<div style="right:0; bottom:0; width:220px; height:100px;"><a href="#" target="_blank"><img src="img/a04.jpg" alt="" /></a></div>
			</li>
			
			<li>
				<div style="left:0; top:0; width:780px; height:380px;"><a href="#" target="_blank"><img src="img/b01.jpg" alt="" /></a></div>
			</li>
			
			<li>
				<div style="left:0; top:0; width:260px; height:210px;"><a href="#" target="_blank"><img src="img/c01.jpg" alt="" /></a></div>

				<div style="left:260px; top:0; width:260px; height:210px;"><a href="#" target="_blank"><img src="img/c02.jpg" alt="" /></a></div>
				<div style="left:0; top:210px; width:520px; height:170px;"><a href="#" target="_blank"><img src="img/c03.jpg" alt="" /></a></div>
				<div style="right:0; top:0; width:260px; height:380px;"><a href="#" target="_blank"><img src="img/c04.jpg" alt="" /></a></div>
			</li>
			
			<li>
				<div style="left:0; top:0; width:560px; height:380px;"><a href="#" target="_blank"><img src="img/d01.jpg" alt="" /></a></div>
				<div style="right:0; top:0; width:220px; height:140px;"><a href="#" target="_blank"><img src="img/d02.jpg" alt="" /></a></div>
				<div style="right:0; top:140px; width:220px; height:140px;"><a href="#" target="_blank"><img src="img/d03.jpg" alt="" /></a></div>
				<div style="right:0; bottom:0; width:220px; height:100px;"><a href="#" target="_blank"><img src="img/d04.jpg" alt="" /></a></div>

			</li>
			
			<li>
				<div style="left:0; top:0; width:780px; height:380px;"><a href="#" target="_blank"><img src="img/e01.jpg" alt="" /></a></div>
			</li>
		</ul>
	</div>