a { border-top-style: none }
b { border-top-style: hidden }
c { border-top-style: dotted }
d { border-top-style: dashed }
e { border-top-style: solid }
f { border-top-style: double }
g { border-top-style: groove }
h { border-top-style: ridge }
i { border-top-style: inset }
j { border-top-style: outset }
z { border-top-style: inherit }