Why this submit form “check list” data doesn't send to email with PHP?

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I am trying to create a check list that allows users to check off each item they want and then send an email to their chosen email. I am using JQueryMobile and I don't know if it's causing any problems, but the page just keeps on loading continuously when I press submit.This is my HTML code:\[code\]<form name="emailform" enctype="multipart/form-data" action="form-to-email.php" method="post"> <div data-role="fieldcontain"> <label for='name'>Festival name: </label><br> <input type="text" name="name"> <h3> Essentials </h3> <fieldset data-role="controlgroup" data-type="vertical"> <legend> </legend> <input name="checkbox1" id="checkbox1" type="checkbox" /> <label for="checkbox1"> Tickets </label> <input name="checkbox2" id="checkbox2" type="checkbox" /> <label for="checkbox2"> Parking pass </label> <input name="checkbox3" id="checkbox3" type="checkbox" /> <label for="checkbox3"> Directions </label> <input name="checkbox4" id="checkbox4" type="checkbox" /> <label for="checkbox4"> Cash & Cards </label> <input name="checkbox5" id="checkbox5" type="checkbox" /> <label for="checkbox5"> Keys </label> </fieldset> <label for='email'>Send to Email:</label><br> <input type="text" name="email"> <input name="share" type="submit" value="http://stackoverflow.com/questions/13702535/Share"> </form>\[/code\]And this is my PHP:\[code\] <?php if(!isset($_POST['submit'])){ if (!$_POST['name'] | !$_POST['email']) { echo"<div class='error'>Error<br />You did not fill in a required field, please review your form and correct the missing information.</div>"; } } $name = $_POST['name']; $email = $_POST['email']; $checkbox1 = $_POST['checkbox1']; $email_from = "Application"; $email_subject = $name; $email_body = "You have received a new checklist via App.\n". "Here is the checklist so far:\n $checkbox1". $headers = "From: $email_from \r\n"; mail($email, $email_subject,$email_body,$headers); header('Location: index.html'); ?>\[/code\]