The Live Map currently uses sliders to set the lower and upper bounds for Elevation. This is not very practical when trying to set the elevation to a certain exact interval. In my case, I'm looking for caches with an elevation between 750 and 800 m. I did manage to set the bounds accordingly by zooming deep into the webpage, so that the 'bound resolution' increases, but this is hardly practical.
A better way IMO would be to have companion numerical input boxes for the lower and upper bounds.