Getting Text From An OpenWysiwyg Enabled TextBox?

I have a multiline text box on a form. I dropped in the js file for openWYSIWYG and attached it to the textbox. When I submit the form, the text box has no value. I'm having problems finding documentation on this library.

The HTML is here:

<table>
<tr><td>Comment</td>
<td><asp:TextBox ID="txtComment"
Height="150px"
TextMode="MultiLine"
runat="server" />
</td>
</tr>
<tr><td colspan="2"><asp:Button ID="btnSubmit"
runat="server"
OnClick="btnSumbit_Click"
Text="Submit" />
</table>
<script type="text/javascript" language="javascript">
WYSIWYG.attach('<%= txtComment.ClientID %>', full);
</script>

The codebehind for the method is:

public void btnSumbit_Click(object sender, EventArgs e)
{
//txtComment.Text is "" The text is not available
}