<link href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//netdna.bootstrapcdn.com/bootstrap/3.1.0/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 id="fullscreen_bg" class="fullscreen_bg"/> <div class="container"> <div id="loginbox" style="margin-top:50px;" class="mainbox col-md-6 col-md-offset-3 col-sm-8 col-sm-offset-2"> <div class="panel panel-info" > <div class="panel-heading"> <div class="panel-title">Sign In</div> <div style="float:right; font-size: 80%; position: relative; top:-10px"><a href="#">Forgot password?</a></div> </div> <div style="padding-top:30px" class="panel-body" > <div style="display:none" id="login-alert" class="alert alert-danger col-sm-12"></div> <form id="loginform" class="form-horizontal" role="form"> <div style="margin-bottom: 25px" class="input-group"> <span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span> <input id="login-username" type="text" class="form-control" name="username" value="" placeholder="username or email"> </div> <div style="margin-bottom: 25px" class="input-group"> <span class="input-group-addon"><i class="glyphicon glyphicon-lock"></i></span> <input id="login-password" type="password" class="form-control" name="password" placeholder="password"> </div> <div class="input-group"> <div class="checkbox"> <label> <input id="login-remember" type="checkbox" name="remember" value="1"> Remember me </label> </div> </div> <div style="margin-top:10px" class="form-group"> <!-- Button --> <div class="col-sm-12 controls"> <a id="btn-login" href="#" class="btn btn-success">Log In </a> <a id="btn-fblogin" href="#" class="btn btn-primary">Register</a> </div> </div> </form> </div> </div> </div> </div> </div>

.fullscreen_bg { position: fixed; top: 0; right: 0; bottom: 0; left: 0; background-size: cover; background-position: 50% 50%; background-image: url('http://cleancanvas.herokuapp.com/img/backgrounds/color-splash.jpg'); background-repeat:repeat; }