jQuery 如何存储，获取和删除 Cookies

jQuery.cookie = function(name, value, options) {
	if (typeof value != 'undefined') {
		options = options || {};
		if (value === null) {
			value = '';
			options = $.extend({}, options);
			options.expires = -1;
		}
		var expires = '';
		if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
			var date;
			if (typeof options.expires == 'number') {
				date = new Date();
				date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));
			} else {
				date = options.expires;
			}
			expires = '; expires=' + date.toUTCString();
		}
		var path = options.path ? '; path=' + (options.path) : '';
		var domain = options.domain ? '; domain=' + (options.domain) : '';
		var secure = options.secure ? '; secure' : '';
		document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
		} else {
			var cookieValue = null;
			if (document.cookie && document.cookie != '') {
			var cookies = document.cookie.split(';');
			for (var i = 0; i < cookies.length; i++) {
				var cookie = jQuery.trim(cookies[i]);
				if (cookie.substring(0, name.length + 1) == (name + '=')) {
					cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
					break;
				}
			}
		}
		return cookieValue;
	}
};

$(document).ready(function() {
	$('#write_cokies').click(function(){
		$.cookie('name', 'test',{expires: 7});				  
	});
	$('#read_ookies').click(function(){
		var test = $.cookie('name');
		alert (test);
	});
	$('#delete_cookies').click(function(){
		$.cookie('name', null);							  
	});
});

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