function changeDisplay() {
	var div = document.getElementById("footer");
	
	if (div.style.display == "none") {
		div.style.display = "block";
	} else {
		div.style.display = "none";
	}
}

function displayShow() {
	var div = document.getElementById("footer");
		div.style.display = "block";
		document.body.style.overflow = "auto";
}

function displayHide() {
	var div = document.getElementById("footer");
		div.style.display = "none";
		document.body.style.overflow = "hidden";
}

function hideScroll(){
	document.body.style.overflow = "hidden";
}