  Triple gauge boson associated production at the LHC serves as an interesting
channel to test the robustness of the Standard Model. Any deviation from its SM
prediction may indicate possible existence of relevant new physics, e.g.,
anomalous quartic gauge boson couplings. In this paper, a Monte-Carlo
feasibility study of measuring WWA production with pure leptonic decays and
probing anomalous quartic gauge-boson (e.g., WWAA) couplings, is presented in
detail for the first time, with parton shower and detector simulation effects
taken into account. Our results show that at the sqrt{s} = 14 TeV LHC with an
integrated luminosity of 100 (30) fb-1, one can reach a significance of 9 (5)
sigma to observe the SM WWA production, and can constrain at the 95% CL the
anomalous WWAA coupling parameters, e.g., a_{0,c}^W/\Lambda^2 (see Ref.[15] for
their definitions), at 10^{-5} GeV^{-2}, respectively.
