Question

I have already tried the information in How do you automatically set the focus to a textbox when a web page loads?

 <asp:TextBox ID="tbSearchLastName" runat="server" style="float:right" CssClass="search" tabindex="1" meta:resourcekey="tbSearchLastNameResource" />

                        <script type="text/javascript">
                            window.onload = function () {
                                document.getElementById("tbSearchLastName").focus();
                            };
                        </script>

I want the page focus to be on the textbox when the page loads but I am getting the error:

“Unable to get value of the property ‘focus’: object is null or undefined”

Thanks.

Answer 1

You have to do like…

document.getElementById('<%= tbSearchLastName.ClientID%>').focus();