//Center Popup
function popup(mypage, myname, w, h, scroll) {
    var winl = (screen.width - w) / 2;
    var wint = (screen.height - h) / 2;
    winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable'
    win = window.open(mypage, myname, winprops)
    if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}
function checkEmail(email)
{
  var error = "";
  if(email.length <= 0)
  {
    error = "You did not enter an email-address.\n";
    return error;
  }
  var splitted = email.match("^(.+)@(.+)$");
  if(splitted == null)
  {
      error = "Please enter a valid email address.\n";
      return error;
  }
  else
  {
    if(splitted[1] != null )
    {
      var regexp_user=/^\"?[\w-_\.]*\"?$/;
      if(splitted[1].match(regexp_user) == null)
      {
          error = "Please enter a valid email address.\n";
          return error;
      }
    }
    if(splitted[2] != null)
    {
      if((splitted[2]).indexOf(".")<=0)
      {
          error = "Please enter a valid email address.\n";
          return error;
      }
      var regexp_domain=/^[\w-\.]*\.[A-Za-z]{2,4}$/;
      if(splitted[2].match(regexp_domain) == null)
      {
          var regexp_ip =/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/;
          if(splitted[2].match(regexp_ip) == null)
          {
              error = "Please enter a valid email address.\n";
              return error;
          }
      }
      return error;
    }
  }
  error = "Please enter a valid email address.\n";
  return error;
}

function ValidatorTrim(s) {
    var m = s.match(/^\s*(\S+(\s+\S+)*)\s*$/);
    return (m == null) ? "" : m[1];
}