请问这个怎么操作--简单--在线等待

Question

<script language="JavaScript">
function check()
{
 if(document.userform.DocComm.value=="")
        {
                alert("Sorry, please input!");
                document.userform.DocComm.focus();
                document.userform.DocComm.select();
                return false;
        }
return true;
}</script>
  <form action="zzz.asp"  method="post"  name="userform" onsubmit="return check()" >
<textarea name="DocComm" cols="40" rows="10" id="DocComm"></textarea>
  </form>