/*<![CDATA[*/
function getUsername()
 {
  if(this.readyState==4)
   {
    usernamesStr = this.responseText;
    if(usernamesStr != "")
     {
      var users;
      if(usernamesStr.indexOf("\n") == -1)
       {
        document.getElementById("username").parentNode.style.visibility = "visible";
        users = usernamesStr+"<input type=\"hidden\" name=\"username\" value=\""+usernamesStr+"\" />\n";
       }
      else
       {
        document.getElementById("username").parentNode.style.visibility = "visible";
        usernames = usernamesStr.split("\n");
        users = "<select size=\"1\" name=\"username\">\n";
        for(i=0; i<usernames.length; i++)
          users = users+"<option value=\""+usernames[i]+"\">"+usernames[i]+"</option>\n";
        users = users+"<option value=\"all\">alle</option>\n";
        users = users+"</select>\n";
       }
      document.getElementById("username").innerHTML = users;
     }
    else
     {
      document.getElementById("username").parentNode.style.visibility = "hidden";
      document.getElementById("username").innerHTML = "";
     }
   }
  return true;
 }
/*]]>*/