javascript 组件传递值 怎么做

 <script language="javascript">
     var zh_shuzhi=0;
     function zh_h()
     {
  shuzhi=form2.t_shuzhi.value;
 
     if(zh_shuzhi==0)
     {
        form2.L_shuzhi.value=shuzhi.toLowerCase();
     }
     }
   </script>
   转换大小写：
   <form id="form2">
     <input type="text" value="请输入数值！" name="t_shuzhi" />
   &nbsp;&nbsp;&nbsp;<input type="text" name="L_shuzhi" />
    <input type=button value='转换大小写' onclick='zh_h()' id="Button1" />
       <asp:Button ID="Button2" runat="server" Text="Button" /></form>

值传递不了我该怎么做 啊！谢谢！