var fToggleVisibilityParamIsVisible = true;

function toggleVisibility(id) {
	if (fToggleVisibilityParamIsVisible == true) {
		document.getElementById(id).style.display = "none";
		fToggleVisibilityParamIsVisible = false;
	}
	else {
		document.getElementById(id).style.display = "block";
		fToggleVisibilityParamIsVisible = true;
	}
}