Trying to make the email field in my form mandatory. Im new to php, more used to javascript but from everything i have read php is more universal. Here is my code, any help would be great.
<?php
$emailsubject = 'Golf Registration';
$webMaster = 'dustin@duncantek.com';
$namea = $_POST['namea'];
$nameb = $_POST['nameb'];
$namec = $_POST['namec'];
$named = $_POST['named'];
$total = $_POST['total'];
$sponsor = $_POST['sponsor'];
$email = $_POST['email'];
$comments = $_POST['comments'];
$body = <<<EOD
<br><hr><br>
Golfer1: = $namea <br>
Golfer2: = $nameb <br>
Golfer3: = $namec <br>
Golfer4: = $named <br>
Total Owed: = $total <br>
Sponsorship Name: = $sponsor <br>
Comments: = $comments<br>
EOD;
$headers = "From: $email\r\n";
$headers .= "Content-type: text/html\r\n";
$success = mail($webMaster, $emailsubject, $body, $headers);
$theResults = <<<EOD
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Thanks For Registering</title>
<link href="golf-website.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="border">
<div class="name">Thanks For Registering!</div>
<div id="links_bg">
<div class="toplinks"><a href="default.html">Homepage</a></div>
<div class="toplinks"><a href="file:///C|/Users/Dustin/Desktop/Templates/Golf-Website/index.html">About Us</a></div>
<div class="toplinks"><a href="file:///C|/Users/Dustin/Desktop/Templates/Golf-Website/index.html">Donations</a></div>
<div class="toplinks"><a href="tourneyinfo.html">Events</a></div>
<div class="toplinks"><a href="file:///C|/Users/Dustin/Desktop/Templates/Golf-Website/index.html">Contact us</a></div>
</div>
<div class="gap"></div>
</div>
</div>
<div id="heading-bg">
<div align="left">Registration Complete</div>
</div>
<div id="main">
<p>Thank you for taking the time to register, we will email you back shortly to confirm registration along with an invoice via paypal. This is strictly for your convenience, we will also accept payment at the course on the day of the tournament. Thanks Again!</p>
</div>
<div id="bottom">
<div class="bottomlink"><a href="default.html">Home</a></div>
<div class="sap">|</div>
<div class="bottomlink"><a href="aboutus.html">About Us</a></div>
<div class="sap">|</div>
<div class="bottomlink"><a href="file:///C|/Users/Dustin/Desktop/Templates/Golf-Website/index.html">Donations</a></div>
<div class="sap">|</div>
<div class="bottomlink"><a href="tourneyinfo.html">Events</a></div>
<div class="sap">|</div>
<div class="bottomlink"><a href="file:///C|/Users/Dustin/Desktop/Templates/Golf-Website/index.html">Contact Us</a></div>
</div>
<center><div class="quicklinks"></div>
</div>
</body>
</html>
EOD;
echo "$theResults";
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Tournament Info</title>
<link href="golf-website.css" rel="stylesheet" type="text/css" />
</head>
<body>
<td width="104"><label for="namea">
<div align="right">Golfer #1:</div>
</label> </td>
<td width="387"><div align="left">
<input name="namea" type="text" id="namea" size="35" maxlength="80" />
</div></td>
</tr>
<tr>
<td><label for="name2">
<div align="right">Golfer #2:</div>
</label> </td>
<td><div align="left">
<input name="nameb" type="text" id="nameb" size="35" maxlength="80" />
</div></td>
</tr>
<tr>
<td><label for="namec">
<div align="right">Golfer #3:</div>
</label> </td>
<td><div align="left">
<input name="namec" type="text" id="namec" size="35" maxlength="80" />
</div></td>
</tr>
<tr>
<td><label for="named">
<div align="right">Golfer #4:</div>
</label> </td>
<td><div align="left">
<input name="named" type="text" id="named" size="35" maxlength="80" />
</div></td>
</tr>
<tr>
<td><div align="right"></div></td>
<td><div align="left">The option to sponsor a hole is also available, the price per hole is $200.00, please enter in the box below what you would like the sponsorship to be if any.</div></td>
</tr>
<tr>
<td><div align="right">
<label for="total">Total:</label>
</div></td>
<td><div align="left">
<input name="total" type="text" id="total" size="35" maxlength="80" />
</div></td>
</tr>
<tr>
<td><div align="right">
<label for="sponsor">Sponsorship:</label>
</div></td>
<td><div align="left">
<input name="sponsor" type="text" id="sponsor" size="35" maxlength="80" />
</div></td>
</tr>
<tr>
<td><div align="right">
<label for="email">Email: </label>
</div></td>
<td><div align="left">
<input name="email" type="text" id="email" size="35" maxlength="80" />
</div></td>
</tr>
<tr>
<td><label for="comments">Additional Comments:</label></td>
<td><textarea name="comments" cols="35" rows="6" id="comments"></textarea></td>
</tr>
</table>
<p> </p>
<blockquote>
<blockquote>
<blockquote>
<blockquote>
<blockquote>
<p>
<input type="submit" name="send" id="send" value="Submit" />
<input type="reset" name="reset" id="reset" value="Reset" />
</p>
</blockquote>
<
</body>
</html>
MOD EDIT: code tags added.