Webpage reloads when paging gridview

Hi Experts!

I have a gridview with paging.
The paging works fine, but when ever I page it seams like the complete webpage is reloaded.
This is not good since the gridview is located far down on my page, and the users needs to scroll down for each pageing.
Could someone tell me what I am doing wrong?

Here is my code:

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
  If Not Page.IsPostBack Then
      loadGrid()
  End If
End Sub

Protected Sub ProductGrid_PageIndexChanging(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewPageEventArgs) Handles ProductGrid.PageIndexChanging
    ProductGrid.PageIndex = e.NewPageIndex
    loadGrid()
End Sub

GridView
########

<asp:GridView id="ProductGrid" Runat="Server" AllowPaging="True" PageSize="1"
      AutoGenerateColumns="False" PagerSettings-Position=Bottom PagerSettings-Mode=NextPrevious
      PagerSettings-FirstPageImageUrl="~/CommonFiles/Images/readMore.jpg"
      PagerSettings-PreviousPageImageUrl="~/CommonFiles/Images/readMore.jpg"
      PagerSettings-NextPageImageUrl="~/CommonFiles/Images/readMore.jpg"
      PagerSettings-LastPageImageUrl="~/CommonFiles/Images/readMore.jpg"
      PagerStyle-HorizontalAlign="Center" GridLines="None">
<Columns>
        <asp:TemplateField>
        <ItemTemplate>
...