Microsoft AJAX $addHandler not working in Firefox

Problem: Microsoft AJAX encapsulates DOM and it’s events and provides a browser independent way (apparently not quite there yet) to deal with the DOM and get creative with the DHTML.

The $addHandler method was not working for me in Firefox and after doing some research I found out that the line highlighted below in “Yellow” in the script section fixes the problem for FF.



<DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Microsoft AJAX $addHandler not working in Firefoxtitle>
head>
<body>
    <center>
        <form id="form1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        <asp:ScriptManager>
        <div>
            <span>Click here:<span>
            <input type="button"id="txtNoDigits" />
        <div>
        <form>
    <center>
<body>

<script type="text/javascript">
    function pageLoad() {
        var txtNoDigits = $get('txtNoDigits');
        $addHandler(txtNoDigits, 'click', txtNoDigits_keypress);
    }
    function pageUnload() {
        $removeHandler($get('txtNoDigits'), 'click', txtNoDigits_keypress);
    }
    function txtNoDigits_keypress(evt) {
        evt.preventDefault();
        alert('hey');
    }
<script>

<html>

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