--Poner la info siguiente despues del contenedor principal
--El codigo usa bootstrap 3

<div class="social">
	<ul>
		<li><a data-toggle="modal" href="#login-bi" class="icon-bi"><img src="assets/index/logo_bi.png"></a></li>
	</ul>
</div>



<div class="modal fade" id="login-bi">
        <div class="modal-dialog" role="document">
        	<div class="modal-content">
        		<div class="modal-header">
        			<img id="img_logo" src="assets/index/logo_bi.png">
        			<button type="button" class="close" data-dismiss="modal" aria-label="Close">
        				<span aria-hidden="true">×</span>
        			</button>
        		</div>
        		
                <form id="BI" action="https://kpionline.bitam.com//fbm/validate_login.php" method="post">					
        			<div class="modal-body">
                        <div class="form-group">
        				    <input id="user_name" name="user_name" class="form-control" type="text" placeholder="Usuario" required="">
        				</div>

                        <div class="form-group">
                            <input id="user_pwd" name="user_pwd" class="form-control" type="password" placeholder="Password" required="">
                        </div>
                    
        			</div>
        			<div class="modal-footer">
        				<div>
        					<button id="bigo" type="submit" class="btn btn-primary btn-lg btn-block" formtarget="_blank" data-toggle="modal" href="#login-bi">Ingresar </button>
        				</div>
        			</div>
                </form>
            </div>
        </div>
    </div>
	
	
en el archivo principal css

.social{
    position:fixed;
    right:-90px;
    top:100px;
    z-index:1000
}
.social ul{
    list-style:none
}
.social ul li a{
    display:inline-block;
    color:#fff;
    background:#000;
    padding:1px;
    text-decoration:none;
    -webkit-transition:all .5s ease;
    -o-transition:all .5s ease;
    transition:all .5s ease
}
.social ul li .icon-bi{
    background:#fff
}
.social ul li a:hover{
    background:#fff;
    padding:1px 90px 0 0
}