datagrid 超连接弹出新窗体

<asp:HyperLinkColumn DataNavigateUrlField="RegionID"   DataNavigateUrlFormatString="javascript:var win=window.open('WebForm2.aspx?ProductID={0}')"
                        DataTextField="RegionID" HeaderText="详细"></asp:HyperLinkColumn>

<asp:HyperLinkColumn DataNavigateUrlField="RegionID" Target =_blank DataNavigateUrlFormatString="WebForm2.aspx?ProductID={0}"
                        DataTextField="RegionID" HeaderText="详细"></asp:HyperLinkColumn>