Add a Cookie in JS to retrieve the cookie value and delete the cookie
Function setCookie (name, value) {var Days = 30; var exp = new Date (); exp. setTime (exp. getTime () + Days * 24x60*60*1000); document. cookie = name + "=" + escape (value) + "; expires =" + exp. toGMTString (); var strsec = getsec (time); var exp = new Date (); exp. setTime (exp. getTime () + strsec * 1); document. cookie = name + "=" + escape (value) + "; expires =" + exp. toGMTString ();} // read cookiesfunction getCookie (name) {Var arr, reg = new RegExp ("(^ |)" + name + "= ([^;] *) (; | $ )"); if (arr = document. cookie. match (reg) return (unescape (arr [2]); else return null;} // Delete cookiesfunction delCookie (name) {var exp = new Date (); exp. setTime (exp. getTime ()-1); var cval = getCookie (name); if (cval! = Null) document. cookie = name + "=" + cval + "; expires =" + exp. toGMTString ();}