var enabled = 0;
function toggleOverlay () {

	if(enabled == 0) {
		document.getElementById('hide-overlay').style.overflowY = 'hidden';
		enabled = 1;
	} else {
		//document.getElementById("hide-overlay").style.overflowY = "scroll";
		document.getElementById("hide-overlay").style.overflowY = null;
		enabled = 0;
	}
    var overlay = document.querySelector("body");
    overlay.classList.toggle('hide-overlay');
}