When I attempt to place a google search on my asp.net page the other buttons onclick events do not fire..

 Here is my code.

<div class="googleSearchBox" style="margin-left:150px">

Search by Keyword:

<asp:TextBox ID="qu" MaxLength="512" Width="250px" AutoPostBack="false" runat="server" />

OnClick="googlesearch_Click" runat="server" />

<asp:RequiredFieldValidator ID="_rfvQ" ControlToValidate="qu" runat="server" />

<asp:HiddenField ID="cx" Value="008038850013659563853:gbg7oenu7bs" runat="server" />

<asp:HiddenField ID="cof" Value="FORID:10" runat="server" />

<br />

<script type="text/javascript">

if (window.event.keyCode == 13) // checks whether the ENTER key

// is pressed

window.event.returnValue = false;

var btn = document.getElementById(btnName);

1    protected void googlesearch_Click(Object sender, EventArgs e)
2        {
3            if (!IsValid)
4                return;
5    
6            Response.Redirect(
7                String.Format(
8                    "http://www.google.com/cse?q={0}&cx={1}&cof={2}",
9                    HttpUtility.UrlEncode(SanitizeUserInput(qu.Text.Trim())),
10                   HttpUtility.UrlEncode(cx.Value),
11                   HttpUtility.UrlEncode(cof.Value)
12                   ),
13               false
14               );
15   
16           Context.ApplicationInstance.CompleteRequest();
17       }

 From your code what I can understand is the RequiredFieldValidator is making the issue.. The validator will work for all the button unless you specidfied ValidationGroup property for the controls you need to validate.

So to make your code work correctly just add a common validationgroup to the google search textbox, button and validation control.

<asp:TextBox ID="qu" MaxLength="512" Width="250px" AutoPostBack="false" runat="server"
ValidationGroup="g" />

<asp:ImageButton ID="googlesearch" Text="Gun Show Search" ValidationGroup="g"
OnClick="googlesearch_Click" runat="server" />

<asp:RequiredFieldValidator ID="_rfvQ" ControlToValidate="qu" runat="server" ValidationGroup="g"  />

 Alternatively you can just disable the validation of other buttons by simply setting CausesValidation="false" .

Sample code

<asp:Button ID="btnOtherButton" Text="Save" runat="server" CausesValidation="false" OnClick="btnSave_Click" />

 you mention validation group="somename" for both requried field validator and for the button

and you also write a line of code as i mentioned 

protected void googlesearch_Click(Object sender, EventArgs e)
       {
 if (Page.IsValid)
        {

your code 

}
}

i hopes it helps you