Recursive implementation of JavaScript hasOwnProperty().

hasOwnProperties.js

//example: 
//var nestedObj = {planet: {earth: {'@continent': 'africa'}}};
//hasOwnProperties(nestedObj, 'planet.earth.@continent') //returns true
//hasOwnProperties(nestedObj, 'planet.earth.@continent', 'africa') //returns true
//hasOwnProperties(nestedObj, 'planet.earth.unicorns') //returns false

  hasOwnProperties: function(target, path, value){
      if (typeof target !== 'object' || target === null) { return false; }

      var parts = path.split('.');

      while(parts.length) {
        var property = parts.shift();
        if (!(target.hasOwnProperty(property))) {
          return false;
        }
        target = target[property];
      }

      if(value){
        return target === value;
      }else{
        return true;
      }
    }