JavaScript, HTML - Is it possible to show value Html.TextAreaFor in Javascript ConfirmBox?

I'm trying to show Value of Html.TextAreaFor in Javascript Confirm Box but 开发者_开发问答my code doesn't work. Maybe somebody has a good idea how to fix it..

This is my code:

<% using (Html.BeginForm())
           { %>
        <%= Html.Hidden("ThreadId", Html.Encode(this.Model.ThreadId))%>
        <%= Html.TextAreaFor(m=>m.Quote,7,40,null)%>
        <br /> <button name="view" value="ViewQuoteButton" onclick="return ViewQuote()">
            View
        </button>
        <% } %>

 <script type="text/javascript">

        function ViewQuote() {

            if (confirm(document.valueOf( "here I'trying to show value of TextAreaFor"))) {

                return true;
            }
            else {
            } return false;
        }
    </script>

Thank you all and take care, Ragims

document.getElementById("Quote").val();

OR

document.getElementByName("Quote").val();