function validate_email(field,alerttxt)

{

with (field)

  {

  apos=value.indexOf("@");

  dotpos=value.lastIndexOf(".");

  if (apos<1||dotpos-apos<2)

    {alert(alerttxt);return false;}

  else {return true;}

  }

}



function validate_form(thisform)

{

with (thisform)

  {

  if (validate_email(email,"Not a valid e-mail address!")==false)

    {email.focus();return false;}

  }

}