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Editorial Team
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Asked: 2026-05-26T20:46:32+00:00

My imagebutton will not cause the popup window to appear when its clicked. Here

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My imagebutton will not cause the popup window to appear when its clicked. Here is my code. 

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<script type="text/javascript">
    function goToAddNewsletterAddPage() 
    {
        window.open("Newsletter.aspx","mywindow");
    }
</script>

    <asp:Image ID="Image1" runat="server" Height="87px" Width="158px" ImageUrl="~/images/signup.gif" onclick="goToAddNewsletterAddPage()"/>
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1 Answer

  1. Editorial Team

    If you look in the console of the browser, you should see a syntax error. Function declarations (the style you’ve used in your script) must have a function name, so there’s a syntax error…

    <script type="text/javascript">
    //    ...v-- here
    function () 
    {
        window.open("Newsletter.aspx","mywindow");
    }
</script>

    Perhaps you meant:

    <script type="text/javascript">
    function goToAddNewsletterAddPage() 
    {
        window.open("Newsletter.aspx","mywindow");
    }
</script>

    (There is a different, but related, thing called a function expression, which doesn’t have to have a function name [and due to IE bugs is usually better off without one], e.g.:

    var x = function() { /* ... */ };

    The key to knowing which is which is to look to see whether the function structure is being used as a right-hand value, e.g., the right-hand side of an assignment [=] or initializer [:], or being passed into a function as an argument. If it is, it’s a function expression; if not, it’s a function declaration.)

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