DefaultModal.js

// We need to pass the ID of the form into the dialog
var formNd = top.aras.getItemByName("Form", "Dialog Example", 0);

// Set the arguments being passed to the dialog
var param = {
	title: "Dialog Example",
	aras: top.aras,
	formId: formNd.getAttribute("id"),
	isEditMode: true
};

// Set the size of the resuling dialog
var options = {
	dialogWidth: 500,
	dialogHeight: 250
};

// Open the dialog
var topWnd = top.aras.getMostTopWindowWithAras();
var wnd = topWnd ? topWnd : window;
var res = wnd.aras.modalDialogHelper.show('DefaultModal', wnd, param, options, 'ShowFormAsADialog.html');
if (res) {
	alert(res.usersName + " loves learning about modal dialogs!");
}