js操作cookie

设置：
function setCookie(sName,sValue,oExpires,sPath,sDomain,bSecure){
var sCookie = sName + "=" +encodeURIComponent(sValue);
if(oExpries){
    sCookie += "; expiress = " + oExpries.toGMTString();
}
if(sPath){
   sCookie += "; path = " + sPath;
}
if(sDomain){
   sCookie += "; domain = " +sDomain;
}
if(bSecure){
   sCookie += "; secure";
}
document.cookie = sCookie;
}
获取:
function getCookie(sName){
  var sRE = "(?:;)?"+ sName + "=([^;]*);?";
  var oRE = new RegExp(sRE);
  if(oRE.test(documnet.cookie)){
     return decodeURIComponent(RegExp["$1"]);
  }
   else{
     return null.;
   }
}