let g:YT='vq'
"f7的映射类型
fun!Mf7(a)
"映射f7,vv,vq,wd(尾逗号)
let s:d={'vv':':call VV()<cr>','vq':':call Vqjd()<cr>','wd':'A,<ESC>'}
let g:YT=a:a
let l=s:d[g:YT]
let ml='noremap <F7> '.l
exe ml
endf
"动态添加映射,既执行又
au BufRead * :call Mf7(g:YT)
"自动执行映射.