获取url参数、cookie信息

获取url参数
getQueryString(name){
     var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");
     var r = window.location.search.substr(1).match(reg);
     if(r!=null){
          return  decodeURIComponent(r[2])=="\"\"" ? "" :   decodeURIComponent(r[2]);
      }else{
          return null;
      }
    }

获取Cookie
getCookie(name){
            var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");
            if(arr=document.cookie.match(reg)){
                 return decodeURIComponent(arr[2])=="\"\""? "" : decodeURIComponent(arr[2]);
            }else{
                return null;
            }
}