Sexy.alert from C# code behind

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C#

ASP.NET

jQuery

AlertDialog

i'm using a jQuery plugin named SexyAlertBox (http://www.coders.me/ejemplos/sexy-alert-box/[^])

This is working:

<input type="button" id="btnHello" onclick="Sexy.alert('Hello!');" />

But i need to call this function from the code behind file too. Usually i use this:

protected void btnError_Click(object sender, EventArgs e)
{
   ClientScript.RegisterStartupScript(this.GetType(), "miscript", "alert('This is an alert from a                                                                                                                  postback!');", true);
}

But isn't working with the Sexy.alert function.
Any ideas? Thank you.