// Shows submenus
function showSubmenu(content)
{
	var objects = document.getElementsByTagName('ul');
	for (i=0;i<objects.length;i++) {
		if (objects[i].className.indexOf("submenu") > -1) {
			objects[i].style.display='none';
		}
	}
	var objects = document.getElementsByTagName('a');
	for (i=0;i<objects.length;i++) {
		if (objects[i].className.indexOf("over") > -1) {
			objects[i].className='normal';
		}
	}
	if (obj_visible = document.getElementById('submenu' + content)) {
		obj_visible.style.display='block';
		document.getElementById('button-' + content).className='over';
	}
	
}