jQuery可关闭的点击圆点图片切换代码焦点图特效

可关闭的jQuery焦点图特效是一款全屏图片轮播，功能很强大且很实用和常用的jquery特效。
$(function() {
	if ($.cookie("weijuju_banner_10") != 1) {
		var f = $(window).width() * 0.39375;
		$("#online_qq_layer").hide();
		$("#focus").height(f);
		$("#focus ul li").width($(window).width());
		$("#top_banner").show().animate({
			height: f + "px"
		},
		2000);
		$(".top_banner_close").click(function() {
			$("#top_banner").remove();
			var h = new Date();
			h.setTime(h.getTime() + (12 * 60 * 60 * 1000));
			$.cookie("weijuju_banner_10", "1", {
				expires: h
			});
			$("#online_qq_layer").show()
		});
		var j = $("#focus").width();
		var a = $("#focus ul li").length;
		var c = 0;
		var g;
		var e = "<div class='btnBg'></div><div class='btn'>";
		for (var d = 0; d < a; d++) {
			e += "<span></span>"
		}
		e += "</div><div class='preNext pre'></div><div class='preNext next'></div>";
		$("#focus").append(e);
		$("#focus .btnBg").css("opacity", 0.5);
		$("#focus .btn span").css("opacity", 0.4).mouseover(function() {
			c = $("#focus .btn span").index(this);
			b(c)
		}).eq(0).trigger("mouseover");
		$("#focus .preNext").css("opacity", 0.2).hover(function() {
			$(this).stop(true, false).animate({
				opacity: "0.5"
			},
			300)
		},
		function() {
			$(this).stop(true, false).animate({
				opacity: "0.2"
			},
			300)
		});
		$("#focus .pre").click(function() {
			c -= 1;
			if (c == -1) {
				c = a - 1
			}
			b(c)
		});
		$("#focus .next").click(function() {
			c += 1;
			if (c == a) {
				c = 0
			}
			b(c)
		});
		$("#focus ul").css("width", j * (a));
		$("#focus").hover(function() {
			clearInterval(g)
		},
		function() {
			g = setInterval(function() {
				b(c);
				c++;
				if (c == a) {
					c = 0
				}
			},
			5000)
		}).trigger("mouseleave");
		function b(h) {
			var i = -h * j;
			$("#focus ul").stop(true, false).animate({
				left: i
			},
			300);
			$("#focus .btn span").stop(true, false).animate({
				opacity: "0.4"
			},
			300).eq(h).stop(true, false).animate({
				opacity: "1"
			},
			300)
		}
	}
});