//http://www.quirksmode.org/js/cookies.html
function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}

//TN custom:
function createScreenSizeCookie(name,value,days) {
	//TN use in if statement in case you want to force users real screen resolution:
	//|| (readCookie("users_resolution") != screen.width)
	if(!readCookie("users_resolution")){//set depending on if cookie is found
		if (days) {
			var date = new Date();
			date.setTime(date.getTime()+(days*24*60*60*1000));
			var expires = "; expires="+date.toGMTString();
		}
		else var expires = "";
		document.cookie = name+"="+value+expires+"; path=/";
		//alert("screen res. set to "+readCookie(name));
		window.location.reload(); //TN reload page to show the right settings to the user
	}
}
//TN change screen res (size of site)
//TN custom:
function setScreenSizeCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
	//alert("screen res. set to "+readCookie(name));
	window.location.reload(); //TN reload page to show the right settings to the user
}