While changing another modal, "Modal-open" class is removed from the body and opened modal not scroll Y-axis properly?

Here is [JSFiddle](https://jsfiddle.net/sangrai/ambxLyqo/)

Kindly suggest the solution?

CODE:

```
<html>
 <body>
<div class="wrapper">
        <!--=== Header v8 ===-->
        <div class="header-v8 header-sticky">
            <!-- Topbar blog -->
            <div class="blog-topbar gap-top-5s">
                <div class="container">
                    <div class="row">
                        <div class="col-sm-4 col-sm-offset-4 clearfix">
                            <ul class="list-inline">
                                <li class="cd-log_reg home"><button class="cd-signin btn-primary" data-target="#login-modal" data-toggle="modal" role="button" href="#"><i class="fa fa-sign-in"></i> Sign in</button></li>
                                <li class="cd-log_reg"><button class="cd-signin btn-primary" data-target="#register-modal" data-toggle="modal" role="button" href="#"><i class="fa fa-sign-up"></i> Sign up</button></li>
                            </ul>
                        </div>
                    </div><!--/end row-->
                </div><!--/end container-->
            </div>
            <!-- End Topbar blog -->
        </div>
    </div>

<!-- MODAL-STARTS -->

<!-- BEGIN # MODAL LOGIN -->
<div class="modal fade" id="login-modal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true" style="display: none;">
        <div class="modal-dialog">
            <div class="modal-content col-sm-12">
                <div class="modal-header" align="center">
                    <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                        <span class="glyphicon glyphicon-remove" aria-hidden="true"></span>
                    </button>
                </div>

                <!-- Begin # DIV Form -->
                <div id="div-forms">

                    <!-- Begin # Login Form -->
                    <form id="login-form">
                        <div class="modal-body">
                            <center><h4 class="skyblue-txt bline-btm pad-btm-10">LOGIN</h4></center>
                            <div class="form-group">
                                <label class="skyblue-txt"><i class="fa fa-user"></i> Username</label>
                                <input id="login_username" class="form-control cst-control" placeholder="Username " required="" type="text">
                            </div>
                            <div class="form-group">
                                <label class="skyblue-txt"><i class="fa fa-lock"></i> Password</label>
                                <input id="login_password" class="form-control cst-control" placeholder="Password" required="" type="password">
                            </div>
                            <div class="form-group">
                                <div class="checkbox">
                                    <label class="skyblue-txt">
                                        <input type="checkbox"> Remember me
                                    </label>
                                </div>
                            </div>
                        </div>
                        <div class="modal-footer">
                            <div class="form-groups">
                                <button class="btn btn-5 btn-primary"><span>Login</span></button>
                            </div>
                            <div class="form-group text-center">
                                <a class="cd-signin lostform">Forget Password</a><br>
                                <span class="">New User</span> <a href="#" role="button" class="myloginpage1">Register Now</a>
                            </div>
                        </div>
                    </form>
                    <!-- End # Login Form -->

                </div>
                <!-- End # DIV Form -->

            </div>
        </div>
</div>
<div class="modal fade" id="register-modal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true" style="display: none;">
        <div class="modal-dialog">
            <div class="modal-content col-sm-12">
                <div class="modal-header" align="center">
                    <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                        <span class="glyphicon glyphicon-remove" aria-hidden="true"></span>
                    </button>
                </div>

                <!-- Begin # DIV Form -->
                <div id="div-forms">
                <!-- Begin | Register Form -->
                    <form id="register-form">
                        <div class="modal-body">
                            <center><h4 class="bline-btm pad-btm-10">REGISTER</h4></center>
                            <div id="div-register-msg">
                                <center><div id="icon-register-msg" class="fa fa-facebook"></div>
                                <a href="#"><span id="text-register-msg">Register with facebook</span></a></center>
                            </div>
                            <div class="form-group">
                                <input id="register_username" class="form-control cst-control" placeholder="Full Name" required="" type="text">
                            </div>
                            <div class="form-group">
                                <input id="register_email" class="form-control cst-control" placeholder="E-Mail" required="" type="text">
                            </div>
                            <div class="form-group">
                                <input id="password" class="form-control cst-control" placeholder="Password" required="" type="text">
                            </div>
                            <div class="form-group">
                                <input id="password" class="form-control cst-control" placeholder="Re-enter Password" required="" type="text">
                            </div>
                        </div>
                        <div class="modal-footer">
                            <div>
                               <button class="btn btn-5 btn-primary"><span>Register</span></button>
                            </div>
                            <div class="last-btngroup">
                                <a class="cd-signin myloginpage" href="#">Log In</a>
                                <a class="lostform" href="#">Forget Password</a>
                            </div>
                        </div>
                    </form>
                    <!-- End | Register Form -->

                </div>
                <!-- End # DIV Form -->

            </div>
        </div>
    </div>
    <!-- END # MODAL LOGIN -->
<div class="modal fade" id="lost-modal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true" style="display: none;">
        <div class="modal-dialog">
            <div class="modal-content col-sm-12">
                <div class="modal-header" align="center">
                    <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                        <span class="glyphicon glyphicon-remove" aria-hidden="true"></span>
                    </button>
                </div>

                <!-- Begin # DIV Form -->
                <div id="div-forms">
                <!-- Begin | Lost Password Form -->
                    <form id="lost-form">
                        <div class="modal-body">
                            <div id="div-lost-msg">
                                <div id="icon-lost-msg" class="glyphicon glyphicon-chevron-right"></div>
                                <span id="text-lost-msg">Type your e-mail.</span>
                            </div>
                            <input id="lost_email" class="form-control cst-control" placeholder="E-Mail" required="" type="text">
                        </div>
                        <div class="modal-footer">
                            <div>
                                <button class="btn btn-5 btn-primary"><span>Submit</span></button>
                            </div>
                            <div class="last-btngroup">
                                <a class="cd-signin myloginpage" href="#">Log In</a>
                                <a href="#" role="button" class="myloginpage1">Register</a>
                            </div>
                        </div>
                    </form>
                    <!-- End | Lost Password Form -->
                  </div>
                <!-- End # DIV Form -->

            </div>
        </div>
    </div>
  </body></html>

```

CSS: 

```
    .btn-primary {
  border: 2px solid #337ab7;
  border-radius: 3px;
  float: left;
  font-size: 18px;
  letter-spacing: 2px;
  margin-bottom: 15px;
  min-width: 300px;
  padding: 15px;
  text-align: center;
  text-transform: uppercase;
  width: 100%;
  text-decoration:none;
}
/* SIGN-IN-MODAL */
/* MODAL-CSS */

#login-modal .modal-dialog {
    width: 350px;
}
#register-modal .modal-dialog {
    width: 350px;
}
#lost-modal .modal-dialog {
    width: 350px;
}

#div-login-msg, #div-lost-msg, #div-register-msg {
  border: 0 none;
  height: 30px;
  line-height: 28px;
  margin-bottom: 15px;
  transition: all 500ms ease-in-out 0s;
}

#div-login-msg.success,
#div-lost-msg.success,
#div-register-msg.success {
    border: 1px solid #68c3a3;
    background-color: #c8f7c5;
}

#div-login-msg.error,
#div-lost-msg.error,
#div-register-msg.error {
    border: 1px solid #eb575b;
    background-color: #ffcad1;
}

#icon-login-msg, #icon-lost-msg, #icon-register-msg {
  background-color: #3b5998;
  color: #fff;
  float: left;
  line-height: 28px;
  margin-right: 5px;
  text-align: center;
  transition: all 500ms ease-in-out 0s;
  width: 30px;
}

#icon-login-msg.success,
#icon-lost-msg.success,
#icon-register-msg.success {
    background-color: #68c3a3 !important;
}

#icon-login-msg.error,
#icon-lost-msg.error,
#icon-register-msg.error {
    background-color: #eb575b !important;
}

#img_logo {
    max-height: 100px;
    max-width: 100px;
}

/* #########################################
   #    override the bootstrap configs     #
   ######################################### */

.modal-backdrop.in {
    filter: alpha(opacity=50);
    opacity: .8;
}

.modal-content {
    background-color: #ececec;
    border: 1px solid #bdc3c7;
    border-radius: 0px;
    outline: 0;
}

.modal-header {
    min-height: 16.43px;
    padding: 15px 15px 15px 15px;
    border-bottom: 0px;
}

.modal-body {
    position: relative;
    padding: 5px 15px 5px 15px;
}

.modal-footer {
    padding: 15px 15px 15px 15px;
    text-align: left;
    border-top: 0px;
}

.checkbox {
    margin-bottom: 0px;
}

.btn {
    border-radius: 0px;
}

.btn:focus,
.btn:active:focus,
.btn.active:focus,
.btn.focus,
.btn:active.focus,
.btn.active.focus {
    outline: none;
}

.btn-lg, .btn-group-lg>.btn {
    border-radius: 0px;
}

.btn-link {
    color: #95a5a6;
}

.btn-link:hover, .btn-link:focus {
    color: #2c3e50;
    text-decoration: none;
}

.glyphicon {
    top: 0px;
}

.form-control {
  border-radius: 0px;
}
#div-login-msg > span {
  font-size: 12px;
}
.pad-btm-10{padding-bottom:10px;}
#login-form label{font-weight:100; font-family:Montserrat; }
#login-modal, #register-modal, #lost-modal{background:rgba(0, 0, 0, 0.7)}
#login-modal .modal-dialog {
  max-width: 380px;
  width: 100%;
  top:10%;
}
#register-form .form-control::-moz-placeholder {
  color: #999;
  opacity: 1;
}

.vfy-btn {
  float: left;
  font-size: 11px;
  margin-top: 10px;
  padding: 2px 25px;
  text-transform: uppercase;
  background:#0097d0; color:#fff;
}
.vfy-btn :hover{color:#fff;}
.cd-signin.lostform {
  float: left;
  margin-bottom: 10px;
  margin-top: 15px;
  width: 100%;
  color:#0dbc42;
}
.myloginpage1{color:#0dbc42;}

.last-btngroup{
    margin-top:10px;
    color:#0dbc42;
}
.last-btngroup a{color:#0dbc42;}
.last-btngroup a:first-child{margin-right:15px;}

/* 
INDIVIDUAL-CAT */
/*  bhoechie tab */
div.bhoechie-tab-container{
  z-index: 10;
  position: fixed;
  right:0;
  top:15px;
  padding: 0 !important;
  margin: 0px;
  background-clip: padding-box;
  opacity: 0.97;
  filter: alpha(opacity=97);
}
div.bhoechie-tab-menu{
  padding-right: 0;
  padding-left: 0;
  padding-bottom: 0;
}
div.bhoechie-tab-menu div.list-group{
  margin-bottom: 0;
}
div.bhoechie-tab-menu div.list-group>a{
  margin-bottom: 0;
}
div.bhoechie-tab-menu div.list-group>a .glyphicon,
div.bhoechie-tab-menu div.list-group>a .fa {
  color: #5A55A3;
}
div.bhoechie-tab-menu div.list-group>a:first-child{
  border-top-right-radius: 0;
  -moz-border-top-right-radius: 0;
}
div.bhoechie-tab-menu div.list-group>a:last-child{
  border-bottom-right-radius: 0;
  -moz-border-bottom-right-radius: 0;
}
div.bhoechie-tab-menu div.list-group>a.active,
div.bhoechie-tab-menu div.list-group>a.active .glyphicon,
div.bhoechie-tab-menu div.list-group>a.active .fa{
  background-color: #5A55A3;
  background-image: #5A55A3;
  color: #ffffff;
}
div.bhoechie-tab-menu div.list-group>a.active:after{
  content: '';
  position: absolute;
  right: 100%;
  top: 50%;
  margin-top: -13px;
  border-bottom: 13px solid transparent;
  border-top: 13px solid transparent;
  border-right: 10px solid #5A55A3;
}

div.bhoechie-tab-content{
  background-color: #ffffff;
  /* border: 1px solid #eeeeee; */
  /*padding-left: 20px;*/
  padding-top: 10px;
}

div.bhoechie-tab>div.bhoechie-tab-content:not(.active) {
    display:none;
}
.gap-top-5s{margin-top:7%;}

```

JS: 

```
   $(".myloginpage").click(function(){
    $('#lost-modal').modal('hide');
    $('#register-modal').modal('hide');
    $("#login-modal").modal('show');
 });
   $(".myloginpage1").click(function(){
    $('#lost-modal').modal('hide');
    $('#login-modal').modal('hide');
    $("#register-modal").modal('show');
 });

   $(".lostform").click(function(){
    $('#register-modal').modal('hide');
    $('#login-modal').modal('hide');
    $("#lost-modal").modal('show');
 });

```