Error Message Balloons

**TicTac** · Aug 29, 2007 11:19

Using the following form code and PHP/CSS, how do I display Error Message Balloons, if data entered in the form is invalid?

Code:

<html>
<head>
<title></title>
</head>

<body>
<form action="" method="post" name="Name" id="Name">
  <label>First Name:</label>
  <input name="FirstName" type="text" id="FirstName">
  <br>
  <label>Last Name: </label>
  <input name="LastName" type="text" id="LastName">
  <br>
  <br>
  <input type="submit" name="Submit" value="Submit">
</form>
</body>
</html>