matches the url and does something if it matches a certain string

HTML

<button onclick='get_url_modal();'>Run Function</button>

Javascript

function get_url_modal() {
  var window_location = window.location.href;
  console.log(window.location.href);
  if(window_location.match(/kruxor.com/g)) {
    console.log('page found...');
    // do some stuff if the page matches the window location text
  }
}
$(document).ready(function(){
  get_url_modal();
});