$(function(){
  //$(".navbar-collapse li:nth-child(3) > a").attr("href","javascript:;");
  //$(".navbar-collapse li:nth-child(5) > a").attr("href","javascript:;");


  //totop
  $(document).on("click", ".suspension .a-top", function(){
		$("html,body").animate({scrollTop: 0});
	});
	$(window).scroll(function(){
		var st = $(document).scrollTop();
		var $top = $(".suspension .a-top");
		if(st > 400){
			$top.css({display: 'block'});
		}else{
			if ($top.is(":visible")) {
				$top.hide();
			}
		}
	});


	var winW = $(window).width();
    if(winW <768){
    	$(".main_cateul li .main_catet").click(function() {
	        $(this).next().slideToggle('slow');
	    });
    }


		


});