function example(/**Circle*/a, b) { /** a global defined in function */ var number = a; var hideNumber = function(){ } setNumber = function(){ } alert('You have chosen: ' + b); } function initPage() { var supported = document.createElement && document.getElementsByTagName; if (!supported) return; // start of DOM script var x = document.getElementById('writeroot'); // etc. } /** an example var */ var document = new Document(x, y); var getNumber = function(){ }