Flatten javascript objects into a single-depth object

Object Flatten

var flattenObject = function(ob) {
  var toReturn = {};
  
  for (var i in ob) {
    if (!ob.hasOwnProperty(i)) { continue; }
    
    if ((typeof ob[i]) === 'object') {
      var flatObject = flattenObject(ob[i]);
      for (var x in flatObject) {
        if (!flatObject.hasOwnProperty(x)) { continue; }
        
        toReturn[i + '.' + x] = flatObject[x];
      }
    } else {
      toReturn[i] = ob[i];
    }
  }
  return toReturn;
};    

Fixes some JSHint errors