Post From Account Payable Line

crmc.require(['sfdc', 'KendoPopup'], function (sfdc, popup) {
    crmc.addCustomAction({
      "itemID": "PayBatch_From_Account_Payable_Line",
      "isAvailable": function (context) {
        // This function is called before the action item is displayed and returns a boolean if the item should be displayed
        // By default determine availability based on Feature Security for this action
         var isEnabled = this.featureSecurity.getSetting(context.objectDescribe.name, this.itemID) !== false;
          // Only allow batch adding from Accounts object for now
          var isVisible = context.objectDescribe.name == ("AcctSeed__Account_Payable_Line__c");
          var multipleSelected = context.selectedRows && context.selectedRows.length > 0;
          return isVisible && isEnabled && multipleSelected;
      },
      "getLabel": function (context) {
        // This function returns the display label of the action item and is called before the item is shown
        return "Pay Batch";
      },
      "createSubmenuItems": function (context) {
        // If this function returns additional action item objects, they will appear as submenu items
        return [];
      },
      "click": function (context) {
          //https://acctseed.cs7.visual.force.com/apex/AccountPayablePayBatch?retURL=%2Fa0H%3Ffcf%3D00BF0000006rihU%26rolodexIndex%3D-1%26page%3D1&wrapMassAction=1&scontrolCaching=1
          // Include static resource from managed namespace pre-creates session and allows us to safely POST data without redirect issue
          var head = document.getElementsByTagName('HEAD').item(0);
          var script = document.createElement("script");
          script.type = "text/javascript";
          head.appendChild(script);
          var domains = window.location.hostname.split(".");
          if (domains.length == 3) {
            instance = domains[0];
          }
          else {
            instance = domains[1];
          }
          script.src = "https://AcctSeed." + instance + ".visual.force.com/resource/AcctSeed__ButtonJSFunctions?ts=" + new Date().getTime();
          script.onerror = function() {
            // Couldn't load app script, assume not installed
            popup.popup("Could not obtain session for Accounting Seed Financial Suite is the app installed?");
          };
          script.onload = function() {
            if (context.selectedRows.length > 0) {
              var selectedIds = [];
              Object.each(context.selectedRows, function (item) {
                  var id = item["AcctSeed__Account_Payable__c"];
                  if(id === undefined || id === null){
                      //Do nothing if empty.
                  } else if(!checkIds(id, selectedIds)){
                     selectedIds.push({name: "ids", value: id}); 
                  }
              });

              if(selectedIds.length > 0) {
                  var parameters = {
                    retURL: context.actionGrid.settings.pageURL,
                  };
                    sfdc.postToVFPage("acctseed", "AccountPayablePayBatch", parameters, selectedIds);
              } else {
                  popup.popup('No IDs to POST', 'Make sure that Accounts Payable is loaded on the grid and that the fields are not empty');
              }
            }
            else {
                popup.popup('Please select records', 'Select at least one record to add to a post to accounts payable.');
            }
          };

          //Does the ID already exist within the array?
          function checkIds(id, arr){
              for (var i = 0; i < arr.length; i++) {
                if(arr[i].value === id){
                  return true;
                }
              };
              return false;
          }
        }
    });
});