To Add a feedback form using jquery

<script type="text/javascript" src="http://ajax.googleapis.com/<br mode=" hold=" />ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript" src="jquery.easing.1.3.js.js"></script>
<script type="text/javascript">
$('#submit_btn').click(function()
{
var name=$('#name').val();
var email=$('#email').val();
var msg=$('#msg').val();
if(name.length>0 && email.length>0 && msg.length>0)
{
$('.left_btn').hide();
$('.right_btn').hide();
$('.box').hide();
$('#feedback').animate(
{left: center+"px"},
{duration: 'slow',easing: 'easeOutElastic'});
$('.thankyou').show();
}
else
{
$('#error').html('Enter some thing');
}
return false();
});

});
</script></script>

<div id="feedback">
<div class="right_btn"><img src="images/feed_right_btn.png" width="26px" height="99px"/></div>


<div class="formdiv">


<div class='thankyou'>
<h3>Thank you !</h3>
<div class="feed_close"><img src="images/feed_close_btn.png" width="16px" height="15px"/></div>
</div>


<div class="box">
<table border="0"> <tr>
<td><label>Name:</label><br/><input type="text" name="name" id="name"/> </td>
<td valign="middle" align="right"><div class="feed_close"><img src="images/feed_close_btn.png" width="16px" height="15px"/></div></td>
</tr> <tr>
<td colspan="2"><label>Email:</label><br/><input type="text" name="email" id="email"/></td>
</tr> <tr>
<td colspan="2"><label>Message: </label><br/&gt;<textarea rows="5" cols="16" name="msg" id="msg"></textarea></td>
</tr> <tr>
<td colspan="2"><input id="submit_btn" type="submit" value="Submit"/><span id="error"></span></td>
</tr> </table>
</div>
</div>


<div class="form_submit"></div>
<div class="left_btn"><img src="images/feed_left_btn.png" width="26px" height="99px"/></div>
</div>