做一个像资源管理器那样的页面

right,I think so.
for ecxample:
<frameset >   
        <frame  >   
        <frameset>   
            <frame   name="left"   src="left.aspx">   
            <frame   name="right"   src="right.aspx">   
        </frameset>   
  </frameset>
when you click one buttom or link in left frame,you should write the below code in this buttom_click event.
       Response.Write("window.parent.main.location='right.aspx';")

soso