var vardata = 'name=' + name + '&email=' + email + '&message=' + message;
<form action="send_mail.php" class="contact-form" method="post">
<div class="row">
<div class="form-group col-sm-6" style="color:#333333;">
<label for="name">Name</label>
<input class="form-control" id="name" name="name" onblur="if(this.value == '') this.value='Name'" onfocus="if(this.value == 'Name') this.value=''" type="text" value="Name">
<div class="error" id="err-name">Please enter name</div>
</div>
<div class="form-group col-sm-6" style="color:#333333;">
<label for="email">E-mail</label>
<input class="form-control" id="email" name="email" type="text" onfocus="if(this.value == 'E-mail') this.value='';" onblur="if(this.value == '') this.value='E-mail';" value="E-mail">
<div class="error" id="err-emailvld">E-mail is not a valid format</div>
</div>
</div>
<div class="row">
<div class="form-group col-md-12" style="color:#333333;">
<label for="message">Message</label>
<textarea class="form-control" id="message" name="message" onblur="if(this.value == '') this.value='Message'" onfocus="if(this.value == 'Message') this.value=''">Message</textarea>
<div class="error" id="err-message">Please enter message</div>
</div>
</div>
<div class="row spacer30"></div>
<div class="row">
<div class="col-md-12 text-center" style="color:#333333;">
<div id="ajaxsuccess">E-mail was successfully sent.</div>
<div class="error" id="err-form">There was a problem validating the form please check!</div>
<div class="error" id="err-timedout">The connection to the server timed out!</div>
<div class="error" id="err-state"></div>
<!--<button type="submit" class="btn btn-primary" id="send" onclick="document.getElementById('ajax-form').submit()">Submit</button>-->
<input type="button" id="submit" name="submit" value="Submit" class="btn btn-primary" />
<!--<button onclick="sendMail(); return false" class="btn btn-primary">Submit</button>-->
</div>
</div>
</form>
<?php $tomail='[email protected]';
$name=$_POST['name'];
$email=$_POST['email'];
$message=$_POST['message'];
$headers = "From: $name\n";
$headers .= "Reply-To: $email_address";
mail($tomail,"Contact Form-Enquiry",$message,$headers); ?>