$( function(){

document.body.addeventlistener('touchstart',function(){});


	
    
	$(window).bind("load", function() {
		var footerheight = 0;
		var footertop = 0;
		 
		positionfooter();
		 
		function positionfooter() {
			// 获取页脚的高度
			footerheight = $(".footer").height();
			// 获取页脚的高度
			/*
				scrolltop() 设置或获取位于对象最顶端和窗口中可见内容的最顶端之间的距离 
			*/
			footertop = ($(window).scrolltop()+$(window).height()-footerheight)+"px";
			//如果页面内容高度小于屏幕高度，div#footer将绝对定位到屏幕底部，否则div#footer保留它的正常静态定位
			if(($(document.body).height()+footerheight) < $(window).height()) {
				$(".footer").addclass("fixed");
			}
		}
		$(window).scroll(positionfooter).resize(positionfooter);
	});

    
//宽高自适应
	img('.autoimg');

	function img(e){
		$(e).on('load', function() {
		    var width = $(this)[0].naturalwidth
		    var height = $(this)[0].naturalheight

		    if ( width > height ) {
		        $(this).height('100%');
		    } else {
		        $(this).css("height","auto");
		        $(this).width('100%')
		    }
		})

	}
	


//返回顶部
	 var $top = $(".right_slide .back_top a");
	 $top.click( function(){
		 $("body,html").animate({ scrolltop: 0 }, 500);
    	 return false;	 
	 } );
	 $(window).scroll(function(){ 
		if($(document).scrolltop()>$(window).height()){ 
			$(".right_slide .back_top").show(); 
		}else{ 
			$(".right_slide .back_top").hide(); 
		} 
	}) 


 // 小屏幕导航 
	 var $smallnavbtn = $(".small_nav_btn");
	 var onoff = true;
	 var $smallnav = $(".small_nav");
	 var $pmask = $(".hidebg");

	 $smallnavbtn.click( function(){
		 if( onoff ){
		 	$(this).addclass("active");
			 $pmask.fadein(200);
		 	$smallnav.slidedown(200)
			 $("body").css("overflow","hidden");
			 $smallnavbtn.find("i").css("background","#000");
		 }else{
		 	$(this).removeclass("active");
			 $smallnav.slideup(200)
			 $pmask.fadeout(200);
			 $("body").css("overflow","auto");
			 $smallnavbtn.find("i").css("background","#000");
		 }
		 onoff = !onoff;
	 } );

	 $pmask.click( function(){
		 // $smallnav.animate({"right":-160},400);
		 $smallnav.slideup(200)
		 $(this).fadeout(400);
		 $("body").css("overflow","auto");
		 $smallnavbtn.find("i").css("background","#000");

		 onoff = true
	 } );
// 手机端导航下拉的下拉
	$(".small_nav .wapper .btn i").click(function(){
		var $this = $(this); 
		if ( $this.next(".show").css("display") == "none" ) {
			$(".small_nav .show").slideup(200);
			$(".small_nav .btn").removeclass("active");
			$this.next(".show").slidedown(200);
			$this.parent().addclass("active");
		}else{
			$this.next(".show").slideup(200);
			$this.parent().removeclass("active");
		}
		
	})
function stopevent(){ 
	var e=arguments.callee.caller.arguments[0]||event; 
	 if (e && e.stoppropagation) { 
	   e.stoppropagation(); 
	 } else if (window.event) { 
	   window.event.cancelbubble = true; 
	 } 
}


	


})