有个单选按钮
<form action="searchbook.asp" method="post" name="form1" target="_top">
<tr>
<td width="187" height="32" align="right">图书检索:
<label>
<input type="radio" name="radiobutton1" value="radiobutton1">
</label> </td>
请问能在本表单内获取radiobutton1的值吗?能的话应该怎么做呢??