when both the pointers are pointing to the same elements ( point 3 )
if ( _one [ 0 ] == _two [ 1 ] && _two [ 0 ] == _one [ 1 ] ) { if ( a1 [ _one [ 0 ] ] < a2 [ _one [ 1 ] ] ) { document . write ( " " + a1 [ _one [ 0 ] ] + " " + a2 [ _one [ 1 ] ] + " " ) ;