function get_window_innerwidth() {
	var result = 0;
	if (window.innerWidth) {
		result = window.innerWidth;
	} else if (document.body && document.body.offsetWidth) {
		result = document.body.offsetWidth;
	}
	return result;
}

function get_window_innerheight() {
	var result = 0;
	if (window.innerWidth) {
		result = window.innerHeight;
	} else if (document.body && document.body.offsetHeight) {
		result = document.body.offsetHeight;
	}
	return result;
}