binding in asp

How can I bind property of one control to property of another?
I want to do something like this:
 <asp:TextBox ID="txt1" runat="server" Visible='<%# Bind("isVisible") %>' ></asp:TextBox>
  <asp:TextBox ID="txt2" runat="server" Enabled='<%# Eval("txt1.Visible") %>' ></asp:TextBox>
Is it possible?
thanks
Shulamit