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Editorial Team
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Asked: 2026-06-17T14:54:56+00:00

I’m trying to run a client-side script from the server-side on Page_Load , I

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I’m trying to run a client-side script from the server-side on Page_Load, I found this code from here.
It’s server side code:

protected void Page_Load(object sender, EventArgs e)
{
    if (!ClientScript.IsStartupScriptRegistered("alert"))
    {
        Page.ClientScript.RegisterStartupScript(this.GetType(),
            "alert", "alertMe();", true);
    }
}

And it’s client side code:

<script type="text/javascript">
    function alertMe() {
        alert('Hello');
    }
</script>

But nothing happens on Page_Load.

UPDATE: source code coderun.

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1 Answer

  1. Editorial Team

    You are calling your alertMe() before it is defined, at the end of the page.

    All scripts registered with asp.net are rendered in the form tag.

    I suggest moving your javascript block to the head of the page.

    <head runat="server">
  <script type="text/javascript">
    function alertMe() {
      alert('Hello');
    }
  </script>
</head>

    Here is your modified code run that works as you expect.

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