搜索引擎里的单选按钮出错
里页有两个单选按钮，
错误如图：




代码如下：
sub showseach()
response.write "<table border=0 width=100% cellpadding=0 cellspacing=0 class=unnamed2 height=100% >"
response.write "<form action=seach.asp method=post name=seach onsubmit='return checkform()'>"
response.write "<tr align=center><td>请选择:<select name=select size=1>"
set rsseach=server.createobject("adodb.recordset")
sqlseach="select * from class"
rsseach.open sqlseach,conn,1,1
for i=1 to rsseach.recordcount
a=rsseach("ClassName")
response.write "<option value=a>"&a&"</option>"
rsseach.movenext
next
response.write "</select></td></tr><tr><td align=center>内&nbsp;&nbsp;容:<input type=text name=keyword size=12></td></tr>"
response.write "<tr><td align=center><input type=radio name=title1 value=主题>主题&nbsp;&nbsp;&nbsp;&nbsp;"
response.write "<input type=radio name=content value=内容>内容"
response.write "<tr><td align=center><input type=submit name=submit value=搜索></td></tr></form></table>"
end sub

单选按钮，能同时选中两个