用javascript 如何传递和接收参数?

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>无标题文档</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
 <SCRIPT language=JavaScript>
 function check(){
       if (document.getElementById('c1').checked){
        document.forms[0].action = "1.htm";
   
   }       if (document.getElementById('c2').checked){
        document.forms[0].action = "2.htm";
   
   }
  return true;
}
</SCRIPT><body>
 <form name="form2" method="post" onsubmit=check() >
  <table width="100%"  border="0" cellspacing="0" cellpadding="0">
     <tr>
       <td ><p>
          <input name="radiobutton" type="radio"  id="c1" value="radiobutton">
         1.htm
           <input name="radiobutton" type="radio" id="c2" value="radiobutton">
           2.htm </p>
         <p>&nbsp;</p>
         <p>
           <input type="submit" name="Submit" value="提交">
         </p></td>
     </tr>
  </table>
 </form>
<p>&nbsp;</p>
</body>
</html>