Check if object member exists in nested object

Question

Is there a simpler way than using ___ in object to check the existence of each level of an object to check the existence of a single member?

More conci

Answer 1

Something like (warning: untested code ahead)

var testProperty = function(obj, proplist) {
   for (var i=0; i < proplist.length; i++) {
      if (obj.hasOwnProperty(proplist[i])) {
         obj = obj[proplist[i]];
      } else {
        return false;
      }
   }
   return true;
}