请教!!!
<select id=s></select><input type=submit onclick="s.add(new Option(fason,fason))">
<select id=s></select>
<input type=button onclick="s.add(new Option(fason,00))" value=test1>
<input type=button onclick="s.options[s.length]=new Option(emu1,01)" value=test2>
<input type=button onclick="with(s[s.length++]){text=emu2;value=02}" value=test2>