//**
  Provides cross-browser css box shadows 
    for Webkit and the future
  arguments are horizontal offset, vertical offset, blur and color

=box-shadow(!ho, !vo, !b, !c )
  /* Webkit (Safari, Chrome)
  -webkit-box-shadow= !ho !vo !b !c
  /* Mozilla (Firefox, Camino)
  -moz-box-shadow= !ho !vo !b !c
  /* CSS3
  box-shadow= !ho !vo !b !c