var winW = 0, winH = 0;
if (window.innerWidth) {
	//if browser supports window.innerWidth
	winW = window.innerWidth;
} else if (document.all) {
	//else if browser supports document.all (IE 4+)
	winW = document.body.clientWidth;
}

if (winW < 800) {
	winW = 313;
} else {
	winW = (winW-378-109);
}