Alert on textbox onClick

I want to throw an alert box when user clicks into input text field and I need to script it in the page head instead of inline. Something like below, but it's not working for me.
<script language="javascript" type="text/javascript">
 var theTextField = document.getElementById('new_otherphoneTextBox');
 theTextField.onClick = alert("Got it");

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You can do that easily using jquery like:
    <script src="scripts/jquery-1.4.1.js" type="text/javascript"></script>

    <script type="text/javascript">
        $(function() {
            $('#new_otherphoneTextBox').click(function() {
                alert("Got it");


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Sailing_12PirateAuthor Commented:
OK. Is there a way for jQuery to fire on right-click instead of regular click?
I'm not a jquery-pro ...
Check this:

$("#new_otherphoneTextBox").bind("contextmenu", function(e) {
    return false; //this will disable right click on the textbox
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