javascirpt Cookie機制

var Cookie = {setCookie:function(name,value,opts){if(value !== undefined){var expires = "",arr = [];opts = opts || {};if(value === null){value = "";expires = -1;}arr.push(encodeURIComponent(name) + " = " + encodeURIComponet(value));if(opts.expires && opts.expires instanceof Date){arr.push("expires = "+ opts.expires.toUTCString());}arr.push(opts.path ? "path = "+opts.path : "");arr.push(opts.domain ? "domain = "+opts.domain : "");arr.push(opts.secure ? "secure"+opts.secure : "");document.cookie = arr.join("; ");}},getCookie:function(name){var dck = document.cookie,cookieVal = null,cname = decodeURIComponent(name) + " =",start = dck.indexOf(cname);if(start > -1){var end = document.cookie.indexOf(";",start);if(end == -1){end = dck.length;}cvalue = decodeURIComponent(dck.substring(start + cname.length , end));}return cvalue;},removeCookie:function(name,opts){opts.expires = new Date(0);Cookie.setCookie(name,"",opts);}}