<div class="nav-box">
    <ul class="nav">
     <li><a href="javascript:void(0);" class="toHome active">Home</a></li>
     <li><a href="javascript:void(0);" class="toPort">Portfolio</a></li>
     <li><a href="javascript:void(0);" class="toCont">Contact</a></li>
    </ul>
    <a href="javascript:void(0);" class="nav-btn">...</a>
</div>

.nav-box {
  position: relative;
}
.nav-btn {
  display: none;
  color: #DE6B73;
  float: right;
  line-height: 20px;
  margin: 35px 0;
}
.nav {
  display: block ;
  border-top: none;
  position: absolute;
  right: 0;
}
@media(max-width:700px){
  .nav-btn{
    display: inline-block;
  }
}
@media(max-width:700px){
 .nav {
  display: none;
  top: 80px;
  background-color: #F79C9C;
  border-top: 1px solid #FFF;
  line-height: 60px;
 }  
}

window.onload=function(){
  $(".nav-btn").click(function(){
    $(".nav").slideToggle(500);
  });
}

.nav {
  display: none;
  position: absolute;
  right: 10%;
  top: 80px;
  background-color: #F79C9C;
  border-top: 1px solid #FFF;
  line-height: 60px;
}
.nav-btn {
  display: none;
  color: #DE6B73;
  float: right;
  line-height: 20px;
  margin: 35px 0;
}
@media(max-width:700px){
  .nav-btn{
    display: inline-block;
  }
}
@media(min-width:700px){
  .nav {
    display: block !important;
    border-top: none;
    top: 15px;
    right: 0;
  }
}