var title=encodeURIComponent("Dummy Title");

var imageUrl = encodeURIComponent("https://place-hold.it/200x200");

var desc=encodeURIComponent("My description");

var shareUrl = encodeURIComponent("http://google.com");

var comment = encodeURIComponent("My comment");

var url = "https://connect.ok.ru/dk?st.shareUrl="+shareUrl

    +"&st.cmd=WidgetSharePreview&st.title="+title+

"&st.description="+desc+"&st.imageUrl="+imageUrl+"&st.content="+comment;

$(document).ready(function(){

  $('#ok-btn').on('click', function(e){

    e.preventDefault();

    console.log('Ok btn was clicked');

    window.open(url);

  });

});