I have to add a text box with lookup values and whenever user selects a value need to change a label text based on the selected value. The lookup list popuulates correctly but user wont be able to scroll down since I have autopostback event..

Anyway to resolve this issue is much appreciated.  Autocompleteextender causes postback when scrolling

<asp:TextBox ID="txtother" CssClass="gridText" Width="200px" OnTextChanged="txtotherother_TextChanged"
                                                            AutoPostBack="true" runat="server" /><asp:AutoCompleteExtender ServiceMethod="SearchOTHER" MinimumPrefixLength="1" CompletionInterval="100"
                                                            EnableCaching="false" CompletionSetCount="5" TargetControlID="txtother"  CompletionListCssClass="autocomplete_completionListElement" CompletionListItemCssClass="autocomplete_listItem"   CompletionListHighlightedItemCssClass="autocomplete_highlightedListItem" ID="AutoCompleteExtender10"
                                                            runat="server" FirstRowSelected="false"></asp:AutoCompleteExtender>