function activate_category(path)
{
	$('parent_cat').enable();
	$('parent_cat').activate();
	$('parent_cat').selectedIndex = 0;
	
	
	if($F('degree_id') == "")
	{
		alert('Please select a degree!');
		return false;
	}
	
	if(path == null)
		var url   = 'ajax.php';
	else
		var url = path+'ajax.php';
		
	var param = 'action=categories&degree_id='+$F('degree_id');

	var myAjax = new Ajax.Request(
		url,
		{
			method: 'post',
			parameters: param,
			onSuccess: function(transport)
			{
            	eval(transport.responseText);
			}
		}
	);
	
	$('category_id').options.length = 0;
	$('category_id').options[0] = new Option('Select a Subject','');
	$('category_id').disable();
	
	return true;
}

function activate_subjects(path)
{
	if($F('parent_cat') == "")
	{
		alert('Please select a category!');
		return false;
	}
	
	if(path == null)
		var url   = 'ajax.php';
	else
		var url = path+'ajax.php';
		
	var param = 'action=subjects&parent_cat='+$F('parent_cat')+'&degree_id='+$F('degree_id');

	var myAjax = new Ajax.Request(
		url,
		{
			method: 'post',
			parameters: param,
			onSuccess: function(transport)
			{
            	eval(transport.responseText);
			}
		}
	);
	
	$('category_id').enable();
	$('category_id').activate();
	
	return true;
}


function submit_form()
{
	if($F('category_id') == "")
	{
		alert('Please select a degree, category, and subject');
		return false;
	}
	
	return true;
}