// GENERAL COOKIE
function setCookie(name,value){
	document.cookie = name+'='+value+';';
}

function getCookie(name){
	var cookie = document.cookie;
	var search_str = name+'=';
	var search_pos = cookie.search(search_str);
	if(search_pos > -1){
		var sub1 = cookie.substring(search_pos+search_str.length);
		var sub2 = sub1.split(';')[0];
		return sub2;
	}else{
		return '';
	}
}

function clearCookie(name){
	document.cookie = name+'=;';
}



//
window.onload = function(){
	
	// OVERVIEW SCROLL
	var overview = document.getElementById('overview');
	overview.onscroll= function(){
		var overview_scrollY = document.getElementById("overview").scrollTop;
		setCookie('overview_scrollY',overview_scrollY);
	}
	
	var overview_scrollY = getCookie('overview_scrollY');
	document.getElementById('overview').scrollTop = overview_scrollY;
	
	
}