jQuery(function($) {
$(document).ready(function() {
//fade_pos = fade timing
//fps = event skip frame
	var fade_pos = 0;
	const ua = navigator.userAgent;
	if ( (ua.indexOf('iPhone') > -1 || (ua.indexOf('Android') > -1 && ua.indexOf('Mobile') > -1)) || (ua.indexOf('iPad') > -1 || ua.indexOf('Android') > -1)) {
		//mobile
		fade_pos = 10;
	}else{
		//pc
		fade_pos = 100;
	}
	var fps = 0;

//element
	var bltin=$('.blt_fadein.blt_hide');
	var bltup=$('.blt_fadein_up.blt_hide');
	var bltright=$('.blt_fadein_right.blt_hide');
	var bltleft=$('.blt_fadein_left.blt_hide');

//flg
	var flg_in=true;
	var flg_up=true;
	var flg_right=true;
	var flg_left=true;
	
//no_element_num
	var numin=$(bltin).length;
	var numup=$(bltup).length;
	var numright=$(bltright).length;
	var numleft=$(bltleft).length;

	if(numin > 0){
		$(bltin).each( function(i){numin = GoddbyHide(this,numin);});
	    $(window).scroll( function(){
	    	if( flg_in && numin > 0){
		    	flg_in = false;
		        $(bltin).each( function(i){numin = GoddbyHide(this,numin);});
		       	setTimeout(function(){
		        	flg_in = true;
		        	return flg_in;
		        },fps);
		     }else{return false;}
	    });
	}
	if(numup > 0){
		$(bltup).each( function(i){numup = GoddbyHide(this,numup);});
	    $(window).scroll( function(){
	    	if( flg_up && numup > 0){
		    	flg_up = false;
		        $(bltup).each( function(i){numup = GoddbyHide(this,numup);});
		       	setTimeout(function(){
		        	flg_up = true;
		        	return flg_up;
		        },fps);
		     }else{return false;}
	    });
	}
	if(numright > 0){
		$(bltright).each( function(i){numright = GoddbyHide(this,numright);});
	    $(window).scroll( function(){
	    	if( flg_right && numright > 0){
		    	flg_right = false;
		        $(bltright).each( function(i){numright = GoddbyHide(this,numright);});
		       	setTimeout(function(){
		        	flg_right = true;
		        	return flg_right;
		        },fps);
		     }else{return false;}
	    });
	}
	if(numleft > 0){
		$(bltleft).each( function(i){numleft = GoddbyHide(this,numleft);});
	    $(window).scroll( function(){
	    	if( flg_left && numleft > 0){
		    	flg_left = false;
		        $(bltleft).each( function(i){numleft = GoddbyHide(this,numleft);});
		       	setTimeout(function(){
		        	flg_left = true;
		        	return flg_left;
		        },fps);
		     }else{return false;}
	    });
	}
	function GoddbyHide(obj,num){
		var top_of_window = $(window).scrollTop();
		var bottom_of_window = $(window).scrollTop() + $(window).height();
		var top_of_element = $(obj).offset().top;
		var height_of_element = $(obj).outerHeight();
		var bottom_of_element = $(obj).offset().top + $(obj).outerHeight();
		if( bottom_of_window - fade_pos >  top_of_element && top_of_window + fade_pos <  bottom_of_element ){
			$(obj).removeClass('blt_hide');
		}
		var x = document.getElementsByClassName("blt_hide");
		return x.length;
	}
});
});