Delete all cookies

javascript:document.cookie="bz=;expires=Thu, 01 Jan 2070 00:00:00 GMT";alert(document.cookie);



javascript:alert("before\n"+document.cookie);var theCookies = document.cookie.split(';');for (var i = 1 ; i <= theCookies.length; i++) {    document.cookie=theCookies[i-1].split("=")[0]+"=0;expires=Thu, 01 Jan 1970 00:00:00 GMT"; };alert("after\n"+document.cookie);