function getClientSize() { var a = h = 0; if (window.innerHeight) { a = window.innerWidth; h = window.innerHeight } else { if (document.documentElement && document.documentElement.clientHeight) { a = document.documentElement.clientWidth; h = document.documentElement.clientHeight } else { a = document.body.clientWidth; h = document.body.clientHeight } } return { width: a, height: h }; }