  A method for determining the time delays in gravitationally lensed quasars is
proposed, which offers a simple and transparent procedure to mitigate the
effects of microlensing. The method is based on fundamental properties of
representation of quadratically integrable functions by their expansions in
orthogonal polynomials series. The method was tested on the artificial light
curves simulated for the Time Delay Challenge campaign TDC0. The new estimates
of the time delays in the gravitationally lensed quasars HE 0435-1223 and PG
1115+080 are obtained and compared with the results reported by other authors
earlier.
