<%@ page contentType="text/html;charset=WINDOWS-1251" %>
<script id="urlscr" type="text/javascript" src=""></script>
<script type="text/javascript" language="JavaScript">
    function enabler()
    {
        document.getElementById('urlscr').src = "existuser.jsp?nickname=" +    document.forms['ValidForm'].idNickname.value;
    }
</script>

<form action="index.jsp" NAME="ValidForm">
    <table>
        <TR ALIGN=Left VALIGN=TOP class=color1>
            <TD>Имя:</td>
            <TD><input id="idNickname" TYPE="text" NAME="nickname" onkeyup=" enabler()">
                <input TYPE="button" NAME="checknickname" VALUE="Проверить имя" onclick="checkName();">
            </td>
        </TR>
        <tr>
            <td></td>
            <td><div id="result" style="DISPLAY: block "><br></div></TD>
        </tr>
    </table>
</form>

<%@ page contentType="text/html;charset=WINDOWS-1251" %>
<%@ page import="objects.User" %>
<%
    String name = request.getParameter("nickname");
    String innerHTML="";

    boolean res = User.getUserOnName(name);
    if (res && name!=null)
    {
       innerHTML="'<strong><tr><td><font color=red>Пользователь с именем: "+name+" уже существует</font></strong></td></tr>'";
    }
    else if (name!=null)
    {
       innerHTML="'<strong><tr><td><font color=green>Имя:"+name+" свободно</font></strong></td></tr>'";
    }
%>
   function checkName()
   {
      var innerHTML=<%=innerHTML%>;

      if(innerHTML!=null)
      {
        var divresult = document.getElementById('result');
        divresult.style.display = 'block';
        divresult.innerHTML=innerHTML;
      }