Open link in new tab - checks for popup blocker

openInNewTab.js

openInNewTab = function(url) {
  var popupBlockerChecker = {
      check: function(popup_window){
          var _scope = this;
          if (popup_window) {
              if(/chrome/.test(navigator.userAgent.toLowerCase())){
                  setTimeout(function () {
                      _scope._is_popup_blocked(_scope, popup_window);
                   },200);
              }else{
                  popup_window.onload = function () {
                      _scope._is_popup_blocked(_scope, popup_window);
                  };
              }
          }else{
              _scope._displayError();
          }
      },
      _is_popup_blocked: function(scope, popup_window){
          if ((popup_window.innerHeight > 0)==false){ scope._displayError(); }
      },
      _displayError: function(){
          alert("Popup Blocker is enabled! Please add this site to your exception list.");
      }
  };

  var popup = window.open(url, '_blank');
  popupBlockerChecker.check(popup);
}