function Toggle(div) {
	obj = document.getElementById(div);
	if (obj.style.display == 'block') {
		obj.style.display = 'none';
	} else {
		obj.style.display = 'block';
	}
}
function UpdateAvailability(day, slot) {
	obj1 = document.getElementById('marker-'+day+'-'+slot);
	obj2 = document.getElementById('slot-'+day+'-'+slot);
	if (obj1.value == '1') {
		obj1.value = '0';
		obj2.src = 'public/images/0.gif';
	} else {
		obj1.value = '1';
		obj2.src = 'public/images/1.gif';
	}
}
function Hilite(img) {
	obj = document.getElementById('nav-'+img);
	obj.src = '/public/images/nav_'+img+'_b.gif';
}
function Lolite(img) {
	obj = document.getElementById('nav-'+img);
	obj.src = '/public/images/nav_'+img+'_a.gif';
}
function SubmitForm(form, action) {
	form.form_action.value = action;
	form.submit();
}