我的ASP代码中 哪里出错了?

<%
dim kg,km,m

kg=20
km=60
if kg<1 then
if km<=30 then
m=0.5
elseif km>30 and km<50 then
m=1
elseif km>50 and km<300 then
m=1.5
else
m=0.3
end if
end if
if kg>1 and kg<15 then
if km<=30 then
m=1
elseif km>30 and km<50 then
m=2
elseif km>50 and km<300 then
m=3
else
m=1.5
end if
end if
if kg>15 and kg<100 then
if km<=30 then
m=1.5
elseif km>30 and km<50 then
m=2
elseif km>50 and km<300 then
m=4
else
m=1
end if
end if
if kg>100 then
if km<=30 then
m=2
elseif km>30 and km<50 then
m=4
elseif km>50 and km<300 then
m=6
else
m=2
end if
e