$(function () {
var sWidth = $("#focus").width();
var len = $("#focus ul li").length;
var index = 0;
var picTimer;
var btn = "
";
for (var i = 0; i btn += "";
}
btn += "
";
$("#focus").append(btn);
$("#focus .btnBg").css("opacity", 0);
$("#focus .btn span").css("opacity", 0.4).mouseenter(function () {
index = $("#focus .btn span").index(this);
showPics(index);
}).eq(0).trigger("mouseenter");
$("#focus .preNext").css("opacity", 0.0).hover(function () {
$(this).stop(true, false).animate({ "opacity": "0.5" }, 300);
}, function () {
$(this).stop(true, false).animate({ "opacity": "0" }, 300);
});
$("#focus .pre").click(function () {
index -= 1;
if (index == -1) { index = len - 1; }
showPics(index);
});
$("#focus .next").click(function () {
index += 1;
if (index == len) { index = 0; }
showPics(index);
});
$("#focus ul").css("width", sWidth * (len));
$("#focus").hover(function () {
clearInterval(picTimer);
}, function () {
picTimer = setInterval(function () {
showPics(index);
index++;
if (index == len) { index = 0; }
}, 2800);
}).trigger("mouseleave");
function showPics(index) {
var nowLeft = -index * sWidth;
$("#focus ul").stop(true, false).animate({ "left": nowLeft }, 300);
$("#focus .btn span").stop(true, false).animate({ "opacity": "0.4" }, 300).eq(index).stop(true, false).animate({ "opacity": "1" }, 300);
}
});