function onOpen(e) {
 var n='Run Script';
 var fn='main';
 var m='hello'; // menu name

 var subMenu = [{name: n, functionName: fn}];
 SpreadsheetApp.getActiveSpreadsheet().addMenu(m, subMenu);
}

function main() {
 var sheet = SpreadsheetApp.getActiveSheet();
 var t1 = 'hello';
 var t2 = 'world';
 sheet.appendRow([t1, t2]);
}
// end main