var Cookie = {
	path: '/',
	domain: null,
	write: function(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=" + this.path + '; ' + (this.domain != null ? ' domain=' + this.domain : '');
	},
	
	read: function (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;
	},
	
	erase: function(name) {
		createCookie(name,"",-1);
	}
};