<form action="#" method="post" id="contactMsg">
    <div class="row">
        <div class="col-md-4">
            <input name="name" id="name"  required="required" type="text"  placeholder="Name">
        </div>
        <div class="col-md-4">
            <input name="email" id="email" required="required" type="text" placeholder="Email">
        </div>
        <div class="col-md-4">
            <input name="subject" id="subject" required="required"  type="text" placeholder="Subject">
        </div>
        <div class="col-md-12">
            <textarea name="comments" id="comment" required="required"  cols="10" rows="10" placeholder="Comments"></textarea>
        </div>
        <div class="col-md-12">
            <input name="comment" id="ContactNow" type="submit" value="Submit">
        </div>
    </div>
</form>

var formData = new FormData($("#contactMsg")[0]);

$.ajax({
    url: 'contactMsg.php',
    data:formData,
    cache: false,
    contentType:false,
    processData:false,
    type: 'post',
    success: function(response) {
        $("#contactMsg")[0].reset();
        $("#SucessMsg").fadeIn('slow').delay(3000).fadeOut('slow');
    }
});