Open different popup window based on condition using JavaScript

I am redirect page using open window in c# My gridview as follows

  Date       Place      In Time       Out Time       Hours      View

  1/1/2018    Delhi     9.30          6.30          9.00      View Details

  8/1/2018    Delhi     10.00         7.00          9.00      View Details

When i click the first row View Details in the gridview. i want to redirect to page1.aspx Similarly when i click the second row View Details in the gridview. i want to redirect to page2.aspx.

for that i written a code as follows

<script type="text/javascript">
    function openWindow(Date) {
        window.open('Page1.aspx?Date=' + Date, 'open_window', ' width=450, height=300, left=0, top=0'); 
    }

    function openWindow(Date) {
        window.open('Page2.aspx?Date=' + Date, 'open_window', ' width=450, height=300, left=0, top=0');  
    }

</script>
<asp:GridView ID="GridView1" runat="server" />
    <Columns>
        <asp:BoundField DataField="Date" HeaderText="Date" />  
        <asp:BoundField DataField="Place" HeaderText="Place" />  
        <asp:BoundField DataField="InTime" HeaderText="InTime" />  
        <asp:BoundField DataField="OutTime" HeaderText="OutTime" />
        <asp:BoundField DataField="WorkingHours" HeaderText="WorkingHours" />
        <asp:TemplateField HeaderText="View">
            <ItemTemplate>
                <a href="#" onclick='openWindow("<%# Eval("Date") %>");'>View Details</a> 
            </ItemTemplate>
        </asp:TemplateField>
   </Columns>
</asp:GridView>

what is the mistake in my above code.