function ShowMenu(obj) {
	HideMenus();
	obj.style.visibility = 'visible';
	closemenus.style.visibility = 'visible';
}
function HideMenus() {
	toc1.style.visibility = 'hidden';
	toc2.style.visibility = 'hidden';
	toc3.style.visibility = 'hidden';
	toc4.style.visibility = 'hidden';
	closemenus.style.visibility = 'hidden'
}
function HideMenusTop() {
	parent.main.toc1.style.visibility = 'hidden';
	parent.main.toc2.style.visibility = 'hidden';
	parent.main.toc3.style.visibility = 'hidden';
	parent.main.toc4.style.visibility = 'hidden';
}