Updating a DIV while writing text into a textarea

I would like to "live" update a DIV in the page with the text the user enter in a textarea. I have the following markup

<div id="previewNote" class="note yellow" style="left:25;top:25px;z-index:1;">
    <div class="body"></div>
    <div class="author"></div>
    <span class="data"></span>
</div>

and wrote this jQuery code

/* Listening for keyup events on fields of the "Add Note" form: */
$("[ID$=NoteText]").live('keyup', function(e) {
    if (!this.preview)
        this.preview = $("[ID$=previewNote]");

    /* Setting the text of the preview to the contents of the 
       input field, and stripping all the HTML tags: */
    this.preview.find(".body").html($(this).val().replace(/<[^>]+>/ig, ''));

});

But the div does not get updated. What do am I missing?

thanks!

EDIT This is the form.

<form action="/Note/SaveOrDelete" id="crudForm" method="post"><input id="IssueNoteID" name="IssueNoteID" type="hidden" value="0">

<!-- The preview: -->
<div id="previewNote" class="note yellow" style="left:25;top:25px;z-index:1;">
    <div class="body"></div>
    <div class="author">admin</div>
    <span class="data"></span>
</div>

<div style="margin: 16px 0px 0px 180px; width: 240px;">
    <table border="0" cellpadding="3" cellspacing="1" width="100%">
    <tbody><tr valign="top">
        <td colspan="2">
            <label for="NoteText">Testo</label>
            <br>
            <te开发者_如何学Pythonxtarea cols="30" id="NoteText" name="NoteText" rows="6"></textarea>
        </td>
    </tr>
    <tr valign="top">
        <td colspan="2" align="right">
            <label for="NoteDate">Data</label>
            <input id="noteDate" name="noteDate" style="width: 120px" type="text" value="" class="hasDatepicker">
        </td>
    </tr>
    </tbody></table>
    <div style="text-align:right;">
        <input type="submit" id="btnSave" value="Salva" class="ui-button ui-widget ui-state-default ui-corner-all" role="button" aria-disabled="false">
    </div>
</div>
</form>

but, listen, I have changed the jQuery code in

/* Listening for keyup events on fields of the "Add a note" form: */
$("[ID$=NoteText]").live('keyup', function(e) {
    /* Setting the text of the preview to the contents of the 
       input field, and stripping all the HTML tags: */
    $("[ID$=previewNote]").find(".body").html($(this).val().replace(/<[^>]+>/ig, ''));
});

and everything works!!! :O

It is very strange...

Using this HTML:

<textarea id="NoteText"></textarea>

<div id="previewNote" class="note yellow" style="left:25;top:25px;z-index:1;">
    <div class="body"></div>
    <div class="author"></div>
    <span class="data"></span>
</div>​​​

and this JS:

​jQuery(function($) {
    var input = $('#NoteText'),
        preview = $('#previewNote div.body');

    input.keyup(function(e) {
        preview.text(input.val());
    });
});​

...works fine for me, and no need to strip tags either.

EDIT

This also works fine for me:

jQuery(function($) {
    $('#NoteText').live('keyup', function(e) {
        $('#previewNote div.body').text($(this).val());
    });
});​

<input name="product_title" id="product_title" type="text">

<h4 class="title">Enter a Title Here</h4>

    $('#product_title').on('keyup', function(e) {
       $('.title').text($(this).val());
    });

this was my solution.