// ATAWA 1.1.0
// Written by Arena Data - support-AT-arena.no - www.arena.no
function setCookie(c_name, c_value, c_expires) {
	var exdate=new Date();
	exdate.setDate(exdate.getDate()+c_expires);
	document.cookie=c_name+ "=" +escape(c_value)+((c_expires===null) ? "" : ";expires="+exdate.toUTCString());
}

function getCookie(c_name) {
	if (document.cookie.length>0) {
		c_start=document.cookie.indexOf(c_name + "=");
		if (c_start!=-1) {
			c_start=c_start + c_name.length+1;
			c_end=document.cookie.indexOf(";",c_start);
			if (c_end==-1) { c_end=document.cookie.length; }
			return unescape(document.cookie.substring(c_start,c_end));
		}
	}
	return "";
}

// cookie variables
var c_name = 'atawa';
var c_expires = 3650;
var c_value = getCookie(c_name);

if (c_value.length === 0) {
	var sec=new Date().getSeconds();
	if (sec < 20) {
		c_value = 'white';
	} else if ( (sec >= 20) && (sec < 40) ) {
		c_value = 'orange';
	} else {  
		c_value = 'blue';
	}
	setCookie(c_name, c_value, c_expires);
} 

// alter A/B-test link
var atawaNews = document.getElementById('atawaNews');
atawaNews.href = atawaNews.href + '-ab-' + c_value;