var Cookie = {

    '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;
    },
    
    'write': function(name, value, expiresAfter) {
    	var expires = "";
    	if (expiresAfter) {
    		var date = new Date();
    		date.setTime(date.getTime() + expiresAfter);
    		expires = "; expires="+date.toGMTString();
    	}
    	document.cookie = name + "=" + value + expires + "; path=/";
    },
    
    'erase': function(name) {
    	Cookie.write(name, '', -1);
    }

}