It's a lot easier for me to change a number in the address bar of my browser to move through the pages/chapters than it is to hunt around on some inaccessible interface, trying to find the previous and next links.
Um, why not just use Calibre (which is cross platform too, by the way) to convert .epub to .htmlz and read it that way. No skipping around in the address bar, with split000.html and split00001.html.