<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <h2>Windows 8 Bootstrap Modals </h2> </div> <div class="row"> <!-- Large modal --> <button type="button" class="btn btn-primary" data-toggle="modal" data-target=".bs-example-modal-lg">Windows 8 modal - Click to View</button> <div class="modal fade bs-example-modal-lg" tabindex="-1" role="dialog" aria-labelledby="myLargeModalLabel"> <div class="modal-dialog modal-lg"> <div class="modal-content"> <div class="modal-body"> <div id=main_head style='position:relative; width:100%; height:100%; min-height:770px; top:0; left:0; z-index:10000; background-color:#fff; opacity:1; '> <div id='iframe_box' style='position:relative; min-width:1024px; min-height:770px; z-index:10000; margin-left:50%; left:-512px; padding-top:25px; top:0%; transform: scale(1);'> <iframe style='border:none;width:100%;height:770px;' src='http://calculator.steko.com.ua/'></iframe> </div> </div> </div> </div> </div> </div> </div> </div>

.modal { /* display: block;*/ padding-right: 0px; background-color: rgba(4, 4, 4, 0.8); } .modal-dialog { top: 20%; width: 100%; position: absolute; } .modal-content { border-radius: 0px; border: none; top: 40%; } .modal-body { background-color: #0f8845; color: white; }