Maybe i am mistaking but i just checked and i can't find a specific html5.js in my folder generated from a droplet in krpano either but the ones I make works in flash and html5 per default.
Check inside the "tiles" folder and see if there are images that have name mobile_whatever - I am a bit new to this but if there are those ones I am almost certain that your panos works in html5 also.
If you have Firefox you can turn of flash and see if it works in html5
which kind of pano image are you trying? 360x180, 360x* or partial? and which droplet are you using? and is the html5 license (the krpanoiphone.license.js) also in the tools folder?