Need Help with Contact Form and Newsletter

<h2>Contact Form</h2>
                            <form method="POST" id="contact_form" name="contact_form" action="contact.php">
                            <p>
                            <label for='name'>Name: </label><br>
                            <input type="text" name="name">
                            </p>
                            <p>
                            <label for='email'>Email: </label><br>
                            <input type="text" name="email">
                            </p>
                            <p>
                            <label for='phone'>Phone: </label><br>
                            <input type="text" name="phone">
                            </p>
                            <p>
                            <label for='message'>Message:</label> <br>
                            <textarea name="message"></textarea>
                            </p>
                            <p>
                            <img src="captcha_code_file.php?rand=<?php echo rand(); ?>" id='captchaimg' ><br>
                            <label for='message'>Enter the code above here :</label><br>
                            <input id="6_letters_code" name="6_letters_code" type="text"><br>
                            <small>Can't read the image? click <a href='javascript: refreshCaptcha();'>here</a> to refresh</small>
                            </p>
                            <input type="hidden" id="submit" name="submit" value="1">
                            <div class="alignright"><div class="alignright"><a href="contacts.html" class="link4" onClick="document.getElementById('contact_form').reset()"><span><span>Clear</span></span></a><a href="javascript: submitform()" class="link2" onClick="document.getElementById('contact_form').submit()"><span><span>Send</span></span></a></div>
                            </form>
                            <script type="text/javascript">
                            function submitform()
                            {
                             document.forms["contact_form"].submit();
                            }
                            </script>
                            <script language="JavaScript">
                            // Code for validating the form
                            var frmvalidator = new Validator("contact_form");
                            //remove the following two lines if you like error message box popups
                            frmvalidator.EnableOnPageErrorDisplaySingleBox();
                            frmvalidator.EnableMsgsTogether();
                            
                            frmvalidator.addValidation("name","req","Please provide your name");
                            frmvalidator.addValidation("email","req","Please provide your email");
                            frmvalidator.addValidation("email","email","Please enter a valid email address");
                            </script>
                            <script language='JavaScript' type='text/javascript'>
                            function refreshCaptcha()
                            {
                                var img = document.images['captchaimg'];
                                img.src = img.src.substring(0,img.src.lastIndexOf("?"))+"?rand="+Math.random()*1000;
                            }
                            </script>