'添加option到指定位置(按value排序)
dim valindex
valindex=-1
for i=0 to selcom.length-1
if selcom.Options(i).value >selallcomoption.value then
valindex=i
exit for
end if
next
dim oOption
set oOption= document.CreateElement("OPTION")
oOption.text = selallcomoption.text
oOption.value =selallcomoption.value
selcom.add(oOption)
if valindex <> -1 then
for i = selcom.length-1 to valindex+1 step -1
selcom.Options(i).text=selcom.Options(i-1).text
selcom.Options(i).value=selcom.Options(i-1).value
next
selcom.Options(valindex).text=selallcomoption.text
selcom.Options(valindex).value=selallcomoption.value
end if