$(document).ready(function(){

 	var	topBtn = $('#topBtn');
	topBtn.hide();

var $ua = navigator.userAgent;
	$(function(){
	    if($ua.indexOf('iPhone') > 0 || $ua.indexOf('iPad') > 0 || $ua.indexOf('iPod') > 0 || $ua.indexOf('android') > 0 || $ua.indexOf('BlackBerry') > 0 || $ua.indexOf('windows Phone') > 0 || $ua.indexOf('NOKIA') > 0 || /Mobile.*Firefox/.test($ua)){
	        console.log("sp");
	        var	showTop = 14030;
	   		// topBtn.hide();

			$(window).on('load scroll resize',function(){
			    if($(window).scrollTop() >= showTop){
			        topBtn.fadeIn(700).addClass("finished");
			    } else if($(window).scrollTop() < showTop){
			        // topBtn.fadeOut(200);
			    }
			});

			topBtn.on('click',function(){
			    $('html,body').animate({scrollTop:'0'},500, 'swing');
			     return false;
			});
	    }else{
	        console.log("pc");
	        $(function(){
	        	var	showTop = 12900,

	   			topBtn = $('#topBtn');

			  	$(window).on('scroll', function(){
				    if ($(this).scrollTop() > 12900) {
				      topBtn.fadeIn(700).addClass("finished");
				    } else {
				      // topBtn.fadeOut(200);
				    // topBtn.addClass("finished");
				    }
				});

				topBtn.on('click',function(){
			    $('html,body').animate({scrollTop:'0'},500, 'swing');
			     return false;
			});
			});
		}
	});
});