i need to add a hperlink inside placeholder

<!DOCTYPE html>
<html lang="en">

    <head>

        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">


        <!-- CSS -->
        <link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Roboto:400,100,300,500">
        <link rel="stylesheet" href="assets/bootstrap/css/bootstrap.min.css">
        <link rel="stylesheet" href="assets/font-awesome/css/font-awesome.min.css">
        <link rel="stylesheet" href="assets/css/form-elements.css">
        <link rel="stylesheet" href="assets/css/style.css">

        <!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
        <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
        <!--[if lt IE 9]>
            <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
            <script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
        <![endif]-->



    </head>

    <body>

        <!-- Top content -->
        <div class="top-content">

            <div class="inner-bg">
                <div class="container">
                                        <div class="row">
                        <div class="col-sm-6 col-sm-offset-3 form-box">
                            <div class="form-top">
                                <div class="form-top-left">
                                    <h3>Login to DigiCash</h3>
                                    <p>Enter your username and password to log on:</p>
                                </div>
                                <div class="form-top-right">
                                    <i class="fa fa-lock"></i>
                                </div>
                            </div>
                            <div class="form-bottom">
                                <form role="form" action="" method="post" class="login-form">
                                    <div class="form-group">
                                        <label class="sr-only" for="form-username">Username</label>
                                        <input type="text" name="form-username" placeholder="Username..." class="form-username form-control" id="form-username">
                                    </div>
                                    <div class="form-group">
                                    <div class="frgt">
                                    <label class="sr-only" for="form-password">Password</label>
                                    <input type="password" name="form-password" placeholder="Password..."  class="form-password form-control" id="form-password">
                                    <a id="lnkforget" class="hyperlink" style="float: right; margin-right: 5px;">Forgot</a>
                                    </div>


                                    </div>
                                    <button type="submit" class="btn">Sign in!</button>
                                     <label class="checkbox" class="sr-only">
                                      <input type="checkbox" value="remember-me">
                                           Remember me
                                      </label>

                                </form>

                            </div>
                        </div>
                    </div>
                    <div class="row">
                        <div class="col-sm-6 col-sm-offset-3 social-login">
                            <h3>...or login with:</h3>
                            <div class="social-login-buttons">
                                <a class="btn btn-link-2" href="#">
                                    <i class="fa fa-facebook"></i> Facebook
                                </a>
                                <a class="btn btn-link-2" href="#">
                                    <i class="fa fa-twitter"></i> Twitter
                                </a>
                                <a class="btn btn-link-2" href="#">
                                    <i class="fa fa-google-plus"></i> Google Plus
                                </a>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

        </div>


        <!-- Javascript -->
        <script src="assets/js/jquery-1.11.1.min.js"></script>
        <script src="assets/bootstrap/js/bootstrap.min.js"></script>
        <script src="assets/js/jquery.backstretch.min.js"></script>
        <script src="assets/js/scripts.js"></script>

        <!--[if lt IE 10]>
            <script src="assets/js/placeholder.js"></script>
        <![endif]-->

    </body>

</html>


body {
    font-family: 'Roboto', sans-serif;
    font-size: 16px;
    font-weight: 300;
    color: #888;
    line-height: 20px;
    text-align: center;
}

strong { font-weight: 500; }

a, a:hover, a:focus {
    color: #de615e;
    text-decoration: none;
    -o-transition: all .3s; -moz-transition: all .3s; -webkit-transition: all .3s; -ms-transition: all .3s; transition: all .3s;
}

h1, h2 {
    margin-top: 10px;
    font-size: 38px;
    font-weight: 100;
    color: #555;
    line-height: 50px;
}

h3 {
    font-size: 22px;
    font-weight: 300;
    color: #555;
    line-height: 30px;
}

img { max-width: 100%; }

::-moz-selection { background: #de615e; color: #191919; text-shadow: none; }
::selection { background: #de615e; color: #191919; text-shadow: none; }


.btn-link-1 {
    display: inline-block;
    height: 50px;
    margin: 5px;
    padding: 16px 20px 0 20px;
    background: #de615e;
    font-size: 16px;
    font-weight: 300;
    line-height: 16px;
    color: #191919;
    -moz-border-radius: 4px; -webkit-border-radius: 4px; border-radius: 4px;
}
.btn-link-1:hover, .btn-link-1:focus, .btn-link-1:active { outline: 0; opacity: 0.6; color: #191919; }

.btn-link-1.btn-link-1-facebook { background: #4862a3; }
.btn-link-1.btn-link-1-twitter { background: #55acee; }
.btn-link-1.btn-link-1-google-plus { background: #dd4b39; }

.btn-link-1 i {
    padding-right: 5px;
    vertical-align: middle;
    font-size: 20px;
    line-height: 20px;
}

.btn-link-2 {
    display: inline-block;
    height: 50px;
    margin: 5px;
    padding: 15px 20px 0 20px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid #191919;
    font-size: 16px;
    font-weight: 300;
    line-height: 16px;
    color: #191919;
    -moz-border-radius: 4px; -webkit-border-radius: 4px; border-radius: 4px;
}
.btn-link-2:hover, .btn-link-2:focus, 
.btn-link-2:active, .btn-link-2:active:focus { outline: 0; opacity: 0.6; background: rgba(0, 0, 0, 0.3); color: #191919; }


/***** Top content *****/

.inner-bg {
    padding: 100px 0 170px 0;
}

.top-content .text {
    color: #191919;
}

.top-content .text h1 { color: #191919; }

.top-content .description {
    margin: 20px 0 10px 0;
}

.top-content .description p { opacity: 0.8; }

.top-content .description a {
    color: #191919;
}
.top-content .description a:hover, 
.top-content .description a:focus { border-bottom: 1px dotted #191919; }

.form-box {
    margin-top: 35px;
}

.form-top {
    overflow: hidden;
    padding: 0 25px 15px 25px;
    background: #444;
    background: rgba(0, 0, 0, 0.35);
    -moz-border-radius: 4px 4px 0 0; -webkit-border-radius: 4px 4px 0 0; border-radius: 4px 4px 0 0;
    text-align: left;
}

.form-top-left {
    float: left;
    width: 75%;
    padding-top: 25px;
}

.form-top-left h3 { margin-top: 0; color: #191919; }
.form-top-left p { opacity: 0.8; color: #191919; }

.form-top-right {
    float: left;
    width: 25%;
    padding-top: 5px;
    font-size: 66px;
    color: #191919;
    line-height: 100px;
    text-align: right;
    opacity: 0.3;
}

.form-bottom {
    padding: 25px 25px 30px 25px;
    background: #444;
    background: rgba(0, 0, 0, 0.3);
    -moz-border-radius: 0 0 4px 4px; -webkit-border-radius: 0 0 4px 4px; border-radius: 0 0 4px 4px;
    text-align: left;
}

.form-bottom form textarea {
    height: 100px;
}

.form-bottom form button.btn {
    width: 100%;
}

.form-bottom form .input-error {
    border-color: #de615e;
}

.social-login {
    margin-top: 35px;
}

.social-login h3 {
    color: #191919;
}

.social-login-buttons {
    margin-top: 25px;
}


/***** Media queries *****/

@media (min-width: 992px) and (max-width: 1199px) {}

@media (min-width: 768px) and (max-width: 991px) {}

@media (max-width: 767px) {

    .inner-bg { padding: 60px 0 110px 0; }

}

@media (max-width: 415px) {

    h1, h2 { font-size: 32px; }

}

input[type=text]:focus {
    border:3px solid  #33ccff;
}
input[type=password]:focus {
    border:3px solid  #33ccff;
}

hi I need to insert a hyperlink inside the placeholder so that it will easy for my customers .how will i achieve that.any help would be much appreciated html