表单提交时,提交div中的评论内容

<div id="myInstance1" style="font-size: 12px; padding: 3px; width: 495px;">
评论内容
</div>

<INPUT type=submit value="发 表 评 论" name="Submit" >

</FORM>

<script type="text/javascript">
function  Submit(){ 
document.getElementById("content").value=document.getElementById("myInstance1").innerHTML;
}
</script>
              <textarea rows="15" cols="80" id="content" name="content" style="display:none"></textarea>
            <INPUT type=submit value="发 表 评 论" name="Submit" ></TD>