function winWidth() {
	if (self.innerWidth) {
		return self.innerWidth;
	}else if (document.documentElement && document.documentElement.clientWidth) {
		return document.documentElement.clientWidth;
	}else if (document.body) {
		return  document.body.clientWidth;
	}
}

function winHeight() {
	if (self.innerHeight) {
		return self.innerHeight;
	}else if (document.documentElement && document.documentElement.clientHeight) {
		return document.documentElement.clientHeight;
	}else if (document.body) {
		return document.body.clientHeight;
	}
}

function docWidth() {
	return ( document.body.scrollHeight > document.body.offsetHeight )? document.body.scrollWidth : document.body.offsetWidth;
}

function docHeight() {
	return ( document.body.scrollHeight > document.body.offsetHeight ) ? document.body.scrollHeight : document.body.offsetHeight;
}