时间范围
<asp:TextBox ID="txtBegin" runat="server"
CssClass="txtfind" onFocus="WdatePicker({maxDate:'#F{$dp.$D(\'txtEnd\');}'})" Width="83px"></asp:TextBox>
至
<asp:TextBox ID="txtEnd" runat="server"
CssClass="txtfind" onFocus="WdatePicker({minDate:'#F{$dp.$D(\'txtBegin\');}'})" Width="83px"></asp:TextBox>