/*
http://www.quirksmode.org/js/cookies.html
*/

function createCookie(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=/";
}

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);
}