php contact form problem

I need a little help with PHP contact form. Every time I submit it I get the error message. Any help is much appreciated:

<?php
  
  $to = "handy@winnpc.com"; // where the submission go
  
  if($_POST['send'])
  	{
	$name = $_POST['name'];
	$email = $_POST['email'];
	$best = $_POST['best_time'];
	$number = $_POST['number'];
	$description = $_POST['description'];
	$best_number = $_POST['best'];
	$alt = $_POST['alt'];
	
	if(!$name || !$email || !$best || !$number || !$description || !$best_number)
		{
		echo '<script type="text/javascript">alert("Please ensure all fields are complete");</script>';
		echo "<meta http-equiv='refresh' content='0; url=contact.php'>";
		}else{
		$go++;
		}
	if(eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $email)) {
	  $go++;
	}
	else {
		echo '<script language="Javascript">alert ("Email is invlalid") </script>';
		echo "<meta http-equiv='refresh' content='0; url=contact.php'>";
	}
		$headers = "From: $name <$email>\n";
		$headers .= "Reply-To: $name <$email>\n";
		
		$date = date("d/m/y H:s");
		
		if($go==2)
			{
			mail($to, "Submission on Handy Mensch", "New message has been posted from $name at $date \n\n Persons Name: $name \n Email: $email \n Best Time to contact: $best \n Best Phone Number: $best_number \n\n Alternate Nuber: $alt \n\n Description: \n $description", $headers);
			echo "<p style='text-align:center;'>Thankyou $name your message has been sent</p>";
			}
	}
  ?>           
<form id="send" method="post" action="">
            <table>
 <tr>
   <td>Your Name:</td>
   <td><input name="name" type="text" id="name" /></td>
 </tr>
 <tr>
   <td>Best contact phone number:</td>
   <td><input name="best" type="text" id="best" /></td>
 </tr>
 <tr>
  <td>Alternate contact phone number:</td>
  <td><input name="alt" type="text" id="alt" /></td>
 </tr>
 <tr>
  <td>Best Time to Contact:</td>
  <td><input name="best_time" type="text" id="best_time" /></td>
 </tr>
 <tr>
  <td>Email address:</td>
  <td><input name="email" type="text" id="email" /></td>
 </tr>
 
 <tr>
  <td>&nbsp;</td>
  <td>&nbsp;</td>
 </tr>
 <tr>
  <td valign="top">Please describe your  project need in detail: </td>
  <td><textarea name="description" id="description" cols="25" rows="5"></textarea></td>
 </tr>
 <tr>
  <td>&nbsp;</td>
  <td>
   <p>
    <label></label>
    <label>
    <input type="submit" name="send" id="send" value="Submit" />
    </label>
   </p>    </td>
 </tr>
</table>
 </form> 

Code (markup):

 

You don't have a field named "number" on your contact form, so $_POST['number'] and therefore $number are both null.

 

got it fixed thanks sea otter!