Netsuite Suitescript to automatically trigger a button click action within an iframe.

/ Create a new inline HTML field called "defaultButton" on the scriptContext.form
                let defaultButton = scriptContext.form.addField({
                  id: "custpage_hide_buttons",
                  label: "default button",
                  type: serverWidget.FieldType.INLINEHTML,
                });

                // Initialize the JavaScript code string
                let scr = "";

                // Append JavaScript code to the scr variable
                scr +=
                  "setTimeout(function(){" +
                  // Get a reference to the iframe with the ID "boxnet_widget_frame"
                  'var iframe = document.getElementById("boxnet_widget_frame");' +
                  "console.log(iframe);" +
                  // Get a reference to the element with the ID "default-association" inside the iframe
                  'var button = iframe.contentWindow.document.getElementById("default-association");' +
                  // Check if the button exists
                  "if (button) {" +
                  // Log the button element to the console
                  'console.log("Button Element:", button);' +
                  // Execute the click function on the button
                  "button.click();" +
                  "}" +
                  "}, 8000)";

                // Set the generated JavaScript code as the default value of the "defaultButton" field
                defaultButton.defaultValue = "<script>" + scr + "</script>";