docs: function setProperties(target/*, source, ...*/)
  	{
  		var i = 1,
  			max = arguments.length,
  			source, prop;
  
  		for (; i < max; ++i)
  		{
  			source = arguments[i];
  			if (!(source instanceof Object))
  				continue;
  
  			for (prop in source)
  			{
  				if (source[prop] == null)
  					continue;
  
  				target[prop] = source[prop];
  			}
  		}
  
  		return target;
  	}