add img
add nav
add style
fix css
fix css
add instruction
fix README
fix README
add function

add drag navbar function
add function

add local memory last vol.
closure
fix last
fix comment
fix localStorage

fix multi vol memory problem
fix btPrev
add picSizefix
Revert "add picSizefix"

This reverts commit c99057a7f86d4d1acc89f4bfee2b559ac2eb8e63.
add size prefix
fix css
fix css