function WindowFocus() {
	window.focus();
}
document.onkeydown = function(e){
	e = (typeof e == "undefined") ? event : e;
	b = (typeof e.which == "number") ? e.which : e.keyCode;
		
	if (b == 39) {location.href = document.getElementById("next").href}
	else if (b == 37) {location.href = document.getElementById("prev").href}
}