$(function () {
 	//nav二级菜单
 	$(".nav li").mouseenter(function () {
 		$(this).find(".nav_more").stop(true, false).slideDown(300);
 	});
 	$(".nav li").mouseleave(function () {
 		$(this).find(".nav_more").stop(true, false).slideUp(300);
 	});
 	//banner 切换
 	var WinW = $(window).width();
 	$(".banner img").width(WinW);
 	$(".chang_banner").css({
 		'left': (WinW - $(".chang_banner").width()) / 2
 	})
 	var BannerPlay = function (e) {
 		$(".banner_ul").stop(true, false).animate({
 			left: -WinW * e
 		}, 500)
 	}
 	var BannerChangePlay = function (e) {
 		$(".chang_banner div").stop(true, false).animate({
 			width: '8px'
 		}, 500).css("background", "#7c7569")
 		$(".chang_banner div:eq(" + e + ")").stop(true, false).animate({
 			width: '50px'
 		}, 500).css("background", "#FFF")
 	}
 	$(".chang_banner div").mouseenter(function () {
 		var Index = $(this).index();
 		BannerChangePlay(Index)
 		BannerPlay(Index)
 	});
 	$(".banner_ul li").width(WinW);
 	var on = 0;
 	var BannerLen = $(".banner_ul li").length;
 	var BannerAutoPlay = function () {
 		if (on >= BannerLen - 1) {
 			on = 0;
 		} else {
 			on++
 		}
 		BannerChangePlay(on)
 		BannerPlay(on)
 	}
 	setInterval(BannerAutoPlay, 3000);
        $(".go_top").click(function() {
		$('html,body').animate({
			scrollTop: '0px'
		}, 500);
	})
 })