use that :D
 HTML code:
      <script >
    if (document.addEventListener) { // IE >= 9;other browsers 
      document.addEventListener('contextmenu', function(e) {
       var modal = document.getElementById('myModal');
 modal.style.display = "block";
var span = document.getElementsByClassName("close")[0];
span.onclick = function() {
    modal.style.display = "none";
}
window.onclick = function(event) {
    if (event.target == modal) {
        modal.style.display = "none";
    }
}
        e.preventDefault();
      }, false);
    } else { // IE < 9 
      document.attachEvent('oncontextmenu', function() {
         var modal = document.getElementById('myModal');
 modal.style.display = "block";
var span = document.getElementsByClassName("close")[0];
span.onclick = function() {
    modal.style.display = "none";
}
window.onclick = function(event) {
    if (event.target == modal) {
        modal.style.display = "none";
    }
}
        window.event.returnValue = false;
      });
    }
  </script>
<p>custom contentmenu as modal </p>
<!-- The Modal -->
<div id="myModal" class="modal">
  <!-- Modal content -->
  <div class="modal-content">
    <span class="close">×</span>
   <p> <a href=" https://rowurbux.weebly.com/contact.html">Contact</a></p>
     <p> <a href="https://rowurbux.weebly.com/support.html">Support</a></p>
  </div>
</div>
css code:
.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 1; /* Sit on top */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgb(0,0,0); /* Fallback color */
    background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}
.modal-content {
    background-color: #fefefe;
    margin: 15% auto; /* 15% from the top and centered */
    padding: 20px;
    border: 1px solid #888;
    width: 80%; /* Could be more or less, depending on screen size */
}
.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}
.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}
I change it for moodal opened after right mouse click xD 
good luck xD