function isFieldEmpty( textObject )
{
   if ( textObject.value.length == 0 )
      return true;
   else
      return false;
}

function isValidValue( textObject )
{
   var i;
   var charValue;
   
   for ( i = 0; i < textObject.value.length; i++ )
   {
      charValue=textObject.value.charAt(i);
      if ( charValue == ' ' || charValue == '\t' ) return false;
   }

   return true;
}

function pageLoad()
{
   document.Login.Username.focus();
   document.Login.Password.value = "";
}

function doIt()
{
   if ( isFieldEmpty( document.Login.Username ) )
   {
      alert("Please enter a Username.");
      document.Login.Username.focus();
      return false;
   }
   
   if ( !isValidValue( document.Login.Username ) )
   {
      alert("Please enter a valid Username. Try again.");
      document.Login.Username.focus();
      return false;
   }

   if ( isFieldEmpty( document.Login.Password ) )
   {
      alert("Please enter a Password.");
      document.Login.Password.focus();
      return false;
   }
   
   if ( !isValidValue( document.Login.Password ) )
   {
      alert("Please enter a valid Password. Try again.");
      document.Login.Password.focus();
      return false;
   }

   return true;
}

function logout()
{
   return true;
}