cookie 常用的几种方法

{
	setCookie: function(sName, sValue, oExpires, sPath, sDomain, bSecure) {
			var sCookie = sName + "=" + encodeURIComponent(sValue); // 名称和值
			if (oExpires) {
				var data = new Date();
				data.setTime(data.getTime() +  oExpires * 60 * 60 * 1000);
				sCookie += "; expires=" + data.toUTCString(); // 过期时间
			}
			if (sPath) {
				sCookie += "; path=" + sPath; // 访问路径
			}
			if (sDomain) {
				sCookie += "; domain=" + sDomain; // 访问路径
			}
			if (bSecure) {
				sCookie += "; secure"; // 安全性
			}
			document.cookie = sCookie;
		},
		getCookie: function(sName) {
			var sRE = '(?:; )?' + sName + '=([^;]*)';
			var oRE = new RegExp(sRE);
			if (oRE.test(document.cookie)) {
				return decodeURIComponent(RegExp['$1']);
			} else {
				return null;
			};
		},
		removeCookie: function(sName, sPath, sDomain) {
			this.setCookie(sName, '',  new Date(0), sPath, sDomain);
		},
		clearAllCookie: function() {
			var cookies = document.cookie.split(';');
			var len = cookie.length;
			for(var i = 0; i < len; i++){
				var cookie = cookie[i];
				var eqPos = cookie.indexof('=');
				var name = eqPos > -1 ? cookie.substr(0, eqPos):cookie;
				name = name.replace(/^\s*|\s*$/, '');
				this.removeCookie(name);
			}
		}
}