<!DOCTYPE HTML>
<html>
<body>
<form action="#" method="post">
<select name="cm_id">
<option value="professional_courier">Professional Courier</option>
<option value="india_post">India Post</option>
</select>
Trackingid: <input type="text" name="trackingid"><br>
<input type="submit">
</form>
<?php
if (!empty($_POST)): header("Location: https://www.tpcindia.com/Tracking2014.aspx?id=".$_POST["trackingid"]."&type=0&service=0");
endif;
?>
</body>
</html>